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Localization of Interacting Dirac Fermions (2018)

Tianxing Ma, Lufeng Zhang, Chia-Chen Chang, Hsiang-Hsuan Hung, and Richard T. Scalettar

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-03-13

Description: Author(s): Tianxing Ma, Lufeng Zhang, Chia-Chen Chang, Hsiang-Hsuan Hung, and Richard T. Scalettar Using exact quantum Monte Carlo calculations, we examine the interplay between localization of electronic states driven by many-body correlations and that by randomness in a two-dimensional system featuring linearly vanishing density of states at the Fermi level. A novel disorder-induced nonmagnetic... [Phys. Rev. Lett. 120, 116601] Published Mon Mar 12, 2018

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Properties of dirty two-band superconductors with repulsive interband interaction: Normal modes, length scales, vortices, and magnetic response (2018)

Julien Garaud, Alberto Corticelli, Mihail Silaev, and Egor Babaev

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-26

Description: Author(s): Julien Garaud, Alberto Corticelli, Mihail Silaev, and Egor Babaev Disorder in two-band superconductors with repulsive interband interaction induces a frustrated competition between the phase-locking preferences of the various potential and kinetic terms. This frustrated interaction can result in the formation of an s + i s superconducting state that breaks the time-r... [Phys. Rev. B 98, 014520] Published Wed Jul 25, 2018

Keywords: Superfluidity and superconductivity

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Attractive Fermi polarons at nonzero temperatures with a finite impurity concentration (2018)

Hui Hu, Brendan C. Mulkerin, Jia Wang, and Xia-Ji Liu

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-26

Description: Author(s): Hui Hu, Brendan C. Mulkerin, Jia Wang, and Xia-Ji Liu We theoretically investigate how quasiparticle properties of an attractive Fermi polaron are affected by nonzero temperature and finite impurity concentration in three dimensions and in free space. By applying both non-self-consistent and self-consistent many-body T -matrix theories, we calculate the... [Phys. Rev. A 98, 013626] Published Wed Jul 25, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Photon-Number-Resolved Measurement of an Exciton-Polariton Condensate (2018)

M. Klaas, E. Schlottmann, H. Flayac, F. P. Laussy, F. Gericke, M. Schmidt, M. v. Helversen, J. Beyer, S. Brodbeck, H. Suchomel, S. Höfling, S. Reitzenstein, and C. Schneider

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-07-26

Description: Author(s): M. Klaas, E. Schlottmann, H. Flayac, F. P. Laussy, F. Gericke, M. Schmidt, M. v. Helversen, J. Beyer, S. Brodbeck, H. Suchomel, S. Höfling, S. Reitzenstein, and C. Schneider By counting the photons emitted from a microcavity, researchers shed light on the nature of an exotic condensate of quasiparticles contained in the cavity. [Phys. Rev. Lett. 121, 047401] Published Wed Jul 25, 2018

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Criterion for quantum Zeno and anti-Zeno effects (2018)

Jia-Ming Zhang, Jun Jing, Li-Gang Wang, and Shi-Yao Zhu

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-27

Description: Author(s): Jia-Ming Zhang, Jun Jing, Li-Gang Wang, and Shi-Yao Zhu In this work, we study the decay behavior of a two-level system under the competing influence of a dissipative environment and repetitive measurements. The sign of the second derivative of the environmental spectral density function with respect to the system transition frequency is found to be a su... [Phys. Rev. A 98, 012135] Published Thu Jul 26, 2018

Keywords: Fundamental concepts

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Spin-1 topological monopoles in the parameter space of ultracold atoms (2018)

Haiping Hu and Chuanwei Zhang

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-27

Description: Author(s): Haiping Hu and Chuanwei Zhang A magnetic monopole is a hypothetical elementary particle with an isolated magnetic pole. Its existence would directly lead to the quantization of electric charges. In recent years, analogs of magnetic monopoles, represented by topological defects in parameter spaces, have been studied in a wide ran... [Phys. Rev. A 98, 013627] Published Thu Jul 26, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Detecting Superconductivity in the High Pressure Hydrides and Metallic Hydrogen from Optical Properties (2018)

J. P. Carbotte, E. J. Nicol, and T. Timusk

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-07-27

Description: Author(s): J. P. Carbotte, E. J. Nicol, and T. Timusk We present a new technique for measuring the critical temperature T c in the high pressure, high T c electron-phonon-driven superconducting hydrides. This technique does not require connecting leads to the sample. In the region of the absorption spectrum above the sum of the optical gap and maximum ph... [Phys. Rev. Lett. 121, 047002] Published Thu Jul 26, 2018

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Enhanced quasiparticle lifetime in a superconductor by selective blocking of recombination phonons with a phononic crystal (2018)

K. Rostem, P. J. de Visser, and E. J. Wollack

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-28

Description: Author(s): K. Rostem, P. J. de Visser, and E. J. Wollack When quasiparticles in a BCS superconductor recombine into Cooper pairs, phonons are emitted within a narrow band of energies above the pairing energy at 2 Δ . We show that a phonon band gap restricting the escape of recombination phonons from a superconductor can increase the quasiparticle recombinat... [Phys. Rev. B 98, 014522] Published Fri Jul 27, 2018

Keywords: Superfluidity and superconductivity

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Spin-orbit-coupled ferroelectric superconductivity (2018)

Shota Kanasugi and Youichi Yanase

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-28

Description: Author(s): Shota Kanasugi and Youichi Yanase Motivated by recent studies on ferroelectriclike order coexisting with metallicity, we investigate ferroelectric (FE) superconductivity in which a FE-like structural phase transition occurs in the superconducting state. We consider a two-dimensional s -wave superconductor with Rashba-type antisymmetr... [Phys. Rev. B 98, 024521] Published Fri Jul 27, 2018

Keywords: Superfluidity and superconductivity

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Topological invariants in dissipative extensions of the Su-Schrieffer-Heeger model (2018)

Felix Dangel, Marcel Wagner, Holger Cartarius, Jörg Main, and Günter Wunner

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-28

Description: Author(s): Felix Dangel, Marcel Wagner, Holger Cartarius, Jörg Main, and Günter Wunner We investigate dissipative extensions of the Su-Schrieffer-Heeger model with regard to different approaches of modeling dissipation. In doing so, we use two distinct frameworks to describe the gain and loss of particles: One uses Lindblad operators within the scope of Lindblad master equations, and ... [Phys. Rev. A 98, 013628] Published Fri Jul 27, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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System-environment correlations and Markovian embedding of quantum non-Markovian dynamics (2018)

Steve Campbell, Francesco Ciccarello, G. Massimo Palma, and Bassano Vacchini

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-31

Description: Author(s): Steve Campbell, Francesco Ciccarello, G. Massimo Palma, and Bassano Vacchini We study the dynamics of a quantum system whose interaction with an environment is described by a collision model, i.e., the open dynamics is modeled through sequences of unitary interactions between the system and the individual constituents of the environment, termed “ancillas,” which are subseque... [Phys. Rev. A 98, 012142] Published Mon Jul 30, 2018

Keywords: Fundamental concepts

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Many-body stabilization of a resonant $p$-wave Fermi gas in one dimension (2018)

Lei Pan, Shu Chen, and Xiaoling Cui

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-31

Description: Author(s): Lei Pan, Shu Chen, and Xiaoling Cui Using the asymptotic Bethe ansatz, we study the stabilization problem of the one-dimensional spin-polarized Fermi gas confined in a hard-wall potential with a tunable p -wave scattering length and finite effective range. We find that the interplay of two factors, i.e., the finite interaction range an... [Phys. Rev. A 98, 011603(R)] Published Mon Jul 30, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Spatial distribution of superfluidity and superfluid distillation of Bose liquids (2018)

T. J. Volkoff and Yongkyung Kwon

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-26

Description: Author(s): T. J. Volkoff and Yongkyung Kwon Under the assumption of two-fluid kinematics of a nonrelativistic Bose liquid in the presence of a local velocity field v ( x ) , local Galilei transformations are used to derive formulas for the spatial distribution of superfluidity. The local formulation is shown to subsume several descriptions of sup... [Phys. Rev. B 98, 014519] Published Wed Jul 25, 2018

Keywords: Superfluidity and superconductivity

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Born-Bogoliubov-Green-Kirkwood-Yvon hierarchy for ultracold bosonic systems (2018)

Sven Krönke and Peter Schmelcher

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-31

Description: Author(s): Sven Krönke and Peter Schmelcher We establish a theoretical framework for exploring the quantum dynamics of finite ultracold bosonic ensembles based on the Born-Bogoliubov-Green-Kirkwood-Yvon (BBGKY) hierarchy for equations of motion for few-particle reduced density matrices (RDMs). The theory applies to zero as well as low tempera... [Phys. Rev. A 98, 013629] Published Mon Jul 30, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Soft phonons reveal the nematic correlation length in $\mathrm{Ba}{({\mathrm{Fe}}_{0.94}{\mathrm{Co}}_{0.06})}_{2}{\mathrm{As}}_{2}$ (2018)

F. Weber, D. Parshall, L. Pintschovius, J.-P. Castellan, M. Kauth, M. Merz, Th. Wolf, M. Schütt, J. Schmalian, R. M. Fernandes, and D. Reznik

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-25

Description: Author(s): F. Weber, D. Parshall, L. Pintschovius, J.-P. Castellan, M. Kauth, M. Merz, Th. Wolf, M. Schütt, J. Schmalian, R. M. Fernandes, and D. Reznik Nematicity is ubiquitous in electronic phases of high- T c superconductors, particularly in the Fe-based systems. While several experiments have probed nematic fluctuations, they have been restricted to uniform or momentum-averaged fluctuations. Here, we investigate the behavior of finite-momentum nem... [Phys. Rev. B 98, 014516] Published Tue Jul 24, 2018

Keywords: Superfluidity and superconductivity

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Resolving different pairing states in Weyl superconductors through the single-particle spectrum (2018)

Tao Zhou, Yi Gao, and Z. D. Wang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-25

Description: Author(s): Tao Zhou, Yi Gao, and Z. D. Wang We study theoretically single-particle spectra of Weyl superconductors. Three different superconducting pairing states are addressed, which are the BCS-type states with the s -wave pairing symmetry and the p + i p -wave pairing symmetry, and the FFLO pairing state. We elaborate that these three states ca... [Phys. Rev. B 98, 024515] Published Tue Jul 24, 2018

Keywords: Superfluidity and superconductivity

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Light-induced new collective modes in the superconductor ${\mathrm{La}}_{1.905}{\mathrm{Ba}}_{0.095}{\mathrm{CuO}}_{4}$ (2018)

S. J. Zhang, Z. X. Wang, L. Y. Shi, T. Lin, M. Y. Zhang, G. D. Gu, T. Dong, and N. L. Wang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-25

Description: Author(s): S. J. Zhang, Z. X. Wang, L. Y. Shi, T. Lin, M. Y. Zhang, G. D. Gu, T. Dong, and N. L. Wang We report near and midinfrared pump, c -axis terahertz probe measurements on a superconducting single crystal La 1.905 Ba 0.095 CuO 4 with T c = 32 K. The measurements reveal that the pump-induced change occurs predominantly at the Josephson plasma edge position below T c . Upon excitation by strong near-infra... [Phys. Rev. B 98, 020506(R)] Published Tue Jul 24, 2018

Keywords: Superfluidity and superconductivity

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Suppression of the magnetic order in CeFeAsO: Nonequivalence of hydrostatic and in-plane chemical pressure (2018)

Philipp Materne, Wenli Bi, Esen Ercan Alp, Jiyong Zhao, Michael Yu Hu, Anton Jesche, Christoph Geibel, Rhea Kappenberger, Saicharan Aswartham, Sabine Wurmehl, Bernd Büchner, Dongzhou Zhang, Til Goltz, Johannes Spehling, and Hans-Henning Klauss

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-25

Description: Author(s): Philipp Materne, Wenli Bi, Esen Ercan Alp, Jiyong Zhao, Michael Yu Hu, Anton Jesche, Christoph Geibel, Rhea Kappenberger, Saicharan Aswartham, Sabine Wurmehl, Bernd Büchner, Dongzhou Zhang, Til Goltz, Johannes Spehling, and Hans-Henning Klauss We present a detailed investigation of the electronic properties of CeFeAsO under in-plane chemical (As by P substitution) and hydrostatic pressure by means of in-house and synchrotron Mössbauer spectroscopy. The Fe magnetism is suppressed due to both pressures and no magnetic order was observed abo... [Phys. Rev. B 98, 014517] Published Tue Jul 24, 2018

Keywords: Superfluidity and superconductivity

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Spinon Fermi Surface in a Cluster Mott Insulator Model on a Triangular Lattice and Possible Application to $1T\text{−}{\mathrm{Ta}\mathrm{S}}_{2}$ (2018)

Wen-Yu He, Xiao Yan Xu, Gang Chen, K. T. Law, and Patrick A. Lee

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-07-25

Description: Author(s): Wen-Yu He, Xiao Yan Xu, Gang Chen, K. T. Law, and Patrick A. Lee 1 T − Ta S 2 is a cluster Mott insulator on the triangular lattice with 13 Ta atoms forming a star of David cluster as the unit cell. We derive a two-dimensional X X Z spin- 1 / 2 model with a four-spin ring exchange term to describe the effective low energy physics of a monolayer 1 T − Ta S 2 , where the effective... [Phys. Rev. Lett. 121, 046401] Published Tue Jul 24, 2018

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Development of Ferromagnetic Fluctuations in Heavily Overdoped $(\mathrm{Bi},\mathrm{Pb}{)}_{2}{\mathrm{Sr}}_{2}{\mathrm{CuO}}_{6+δ}$ Copper Oxides (2018)

Koshi Kurashima, Tadashi Adachi, Kensuke M. Suzuki, Yasushi Fukunaga, Takayuki Kawamata, Takashi Noji, Hitoshi Miyasaka, Isao Watanabe, Masanori Miyazaki, Akihiro Koda, Ryosuke Kadono, and Yoji Koike

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-02

Description: Author(s): Koshi Kurashima, Tadashi Adachi, Kensuke M. Suzuki, Yasushi Fukunaga, Takayuki Kawamata, Takashi Noji, Hitoshi Miyasaka, Isao Watanabe, Masanori Miyazaki, Akihiro Koda, Ryosuke Kadono, and Yoji Koike We demonstrate the presence of ferromagnetic (FM) fluctuations in the superconducting and nonsuperconducting heavily overdoped regimes of high-temperature superconducting copper oxides, using ( Bi , Pb ) 2 Sr 2 CuO 6 + δ (Bi-2201) single crystals. Magnetization curves exhibit a tendency to be saturated in high... [Phys. Rev. Lett. 121, 057002] Published Wed Aug 01, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Defect-Assisted Tunneling Electroresistance in Ferroelectric Tunnel Junctions (2018)

Konstantin Klyukin, L. L. Tao, Evgeny Y. Tsymbal, and Vitaly Alexandrov

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-04

Description: Author(s): Konstantin Klyukin, L. L. Tao, Evgeny Y. Tsymbal, and Vitaly Alexandrov Recent experimental results have demonstrated ferroelectricity in thin films of SrTiO 3 induced by antisite Ti Sr defects. This opens a possibility to use SrTiO 3 as a barrier layer in ferroelectric tunnel junctions (FTJs)—emerging electronic devices promising for applications in nanoelectronics. Here ... [Phys. Rev. Lett. 121, 056601] Published Fri Aug 03, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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No-signaling principle and quantum brachistochrone problem in $\mathcal{PT}$-symmetric fermionic two- and four-dimensional models (2018)

Alireza Beygi and S. P. Klevansky

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-04

Description: Author(s): Alireza Beygi and S. P. Klevansky Fermionic systems differ from bosonic ones in several ways, in particular the time-reversal operator T is odd, T 2 = − 1 . For PT -symmetric bosonic systems, the no-signaling principle and the quantum brachistochrone problem have been studied to some degree, both of them controversially. In this paper, we... [Phys. Rev. A 98, 022105] Published Fri Aug 03, 2018

Keywords: Fundamental concepts

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Quantum walks assisted by particle-number fluctuations (2018)

R. A. Vargas–Hernández and R. V. Krems

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-04

Description: Author(s): R. A. Vargas–Hernández and R. V. Krems We study the spreading of a quantum particle placed in a single site of a lattice or binary tree with the Hamiltonian permitting particle-number changes. We show that the particle-number-changing interactions accelerate the spreading beyond the ballistic expansion limit by inducing off-resonant Rabi... [Phys. Rev. A 98, 022107] Published Fri Aug 03, 2018

Keywords: Fundamental concepts

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Paradoxical consequences of multipath coherence: Perfect interaction-free measurements (2018)

Z. Zhao, S. Mondal, M. Markiewicz, A. Rutkowski, B. Dakić, W. Laskowski, and T. Paterek

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-07

Description: Author(s): Z. Zhao, S. Mondal, M. Markiewicz, A. Rutkowski, B. Dakić, W. Laskowski, and T. Paterek Quantum coherence can be used to infer the presence of a detector without triggering it. Here we point out that, according to quantum mechanics, such interaction-free measurements cannot be perfect, i.e., in a single-shot experiment one has strictly positive probability to activate the detector. We ... [Phys. Rev. A 98, 022108] Published Mon Aug 06, 2018

Keywords: Fundamental concepts

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Spin-orbit-coupled soliton in a random potential (2018)

Sh. Mardonov, V. V. Konotop, B. A. Malomed, M. Modugno, and E. Ya. Sherman

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-07

Description: Author(s): Sh. Mardonov, V. V. Konotop, B. A. Malomed, M. Modugno, and E. Ya. Sherman We investigate theoretically the dynamics of a spin-orbit-coupled soliton formed by a self-interacting Bose-Einstein condensate immersed in a random potential, in the presence of an artificial magnetic field. We find that, due to the anomalous spin-dependent velocity, the synthetic Zeeman coupling c... [Phys. Rev. A 98, 023604] Published Mon Aug 06, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Uncovering the nonequilibrium phase structure of an open quantum spin system (2018)

S. Helmrich, A. Arias, and S. Whitlock

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-07

Description: Author(s): S. Helmrich, A. Arias, and S. Whitlock We experimentally and theoretically investigate the nonequilibrium phase structure of a well-controlled driven-dissipative quantum spin system governed by the interplay of coherent driving, spontaneous decay, and long-range spin-spin interactions. We discover that the rate of population loss provide... [Phys. Rev. A 98, 022109] Published Mon Aug 06, 2018

Keywords: Fundamental concepts

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Josephson-effect diagnostic of competing orders in quantum critical multiband superconductors (2018)

Maxim Dzero and Alex Levchenko

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-08-07

Description: Author(s): Maxim Dzero and Alex Levchenko Motivated by the recent experimentally observed manifestations of the quantum critical point fluctuations in the thermodynamic properties of multiband superconductors, we derive a general expression for the Josephson current of various junctions between two superconductors in the phase of supercondu... [Phys. Rev. B 98, 054501] Published Mon Aug 06, 2018

Keywords: Superfluidity and superconductivity

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Counterpropagating Fractional Hall States in Mirror-Symmetric Dirac Semimetals (2018)

Yafis Barlas

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-08

Description: Author(s): Yafis Barlas The Landau bands of mirror symmetric 2D Dirac semimetals (e.g., odd layers of A B A graphene) can be identified by their parity with respect to mirror symmetry. This symmetry facilitates a new class of counterpropagating Hall states. We predict the presence of a Laughlin-like correlated liquid state, ... [Phys. Rev. Lett. 121, 066602] Published Tue Aug 07, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Generation of Quantized Polaritons below the Condensation Threshold (2018)

Peter Cristofolini, Z. Hatzopoulos, Pavlos G. Savvidis, and Jeremy J. Baumberg

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-08

Description: Author(s): Peter Cristofolini, Z. Hatzopoulos, Pavlos G. Savvidis, and Jeremy J. Baumberg Exciton polaritons in high quality semiconductor microcavities can travel long macroscopic distances ( 〉 100 μ m ) due to their ultralight effective mass. The polaritons are repelled from optically pumped exciton reservoirs where they are formed; however, their spatial dynamics is not as expected fo... [Phys. Rev. Lett. 121, 067401] Published Tue Aug 07, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Magnon Splitting Induced by Charge Transfer in the Three-Orbital Hubbard Model (2018)

Yao Wang, Edwin W. Huang, Brian Moritz, and Thomas P. Devereaux

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-06-12

Description: Author(s): Yao Wang, Edwin W. Huang, Brian Moritz, and Thomas P. Devereaux Understanding spin excitations and their connection to unconventional superconductivity have remained central issues since the discovery of cuprates. Direct measurement of the dynamical spin structure factor in the parent compounds can provide key information on important interactions relevant in th... [Phys. Rev. Lett. 120, 246401] Published Mon Jun 11, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Magnetic tricritical point and nematicity in FeSe under pressure (2018)

Rustem Khasanov, Rafael M. Fernandes, Gediminas Simutis, Zurab Guguchia, Alex Amato, Hubertus Luetkens, Elvezio Morenzoni, Xiaoli Dong, Fang Zhou, and Zhongxian Zhao

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-06-14

Description: Author(s): Rustem Khasanov, Rafael M. Fernandes, Gediminas Simutis, Zurab Guguchia, Alex Amato, Hubertus Luetkens, Elvezio Morenzoni, Xiaoli Dong, Fang Zhou, and Zhongxian Zhao Magnetism induced by external pressure ( p ) was studied in a FeSe crystal sample by means of muon-spin rotation. The magnetic transition changes from second order to first order for pressures exceeding the critical value p c ≃ 2.4 – 2.5 GPa. The magnetic ordering temperature ( T N ) and the value of the magn... [Phys. Rev. B 97, 224510] Published Wed Jun 13, 2018

Keywords: Superfluidity and superconductivity

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All the noncontextuality inequalities for arbitrary prepare-and-measure experiments with respect to any fixed set of operational equivalences (2018)

David Schmid, Robert W. Spekkens, and Elie Wolfe

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-06

Description: Author(s): David Schmid, Robert W. Spekkens, and Elie Wolfe Within the framework of generalized noncontextuality, we introduce a general technique for systematically deriving noncontextuality inequalities for any experiment involving finitely many preparations and finitely many measurements, each of which has a finite number of outcomes. Given any fixed sets... [Phys. Rev. A 97, 062103] Published Tue Jun 05, 2018

Keywords: Fundamental concepts

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Spin-imbalanced pairing and Fermi surface deformation in flat bands (2018)

Kukka-Emilia Huhtinen, Marek Tylutki, Pramod Kumar, Tuomas I. Vanhala, Sebastiano Peotta, and Päivi Törmä

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-06-06

Description: Author(s): Kukka-Emilia Huhtinen, Marek Tylutki, Pramod Kumar, Tuomas I. Vanhala, Sebastiano Peotta, and Päivi Törmä We study the attractive Hubbard model with spin imbalance on two lattices featuring a flat band: the Lieb and kagome lattices. We present mean-field phase diagrams featuring exotic superfluid phases, similar to the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, whose stability is confirmed by dynami... [Phys. Rev. B 97, 214503] Published Tue Jun 05, 2018

Keywords: Superfluidity and superconductivity

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Distinguishing topological Majorana bound states from trivial Andreev bound states: Proposed tests through differential tunneling conductance spectroscopy (2018)

Chun-Xiao Liu, Jay D. Sau, and S. Das Sarma

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-06-06

Description: Author(s): Chun-Xiao Liu, Jay D. Sau, and S. Das Sarma Trivial Andreev bound states arising from chemical-potential variations could lead to zero-bias tunneling conductance peaks at finite magnetic field in class-D nanowires, precisely mimicking the predicted zero-bias conductance peaks arising from the topological Majorana bound states. This finding ra... [Phys. Rev. B 97, 214502] Published Tue Jun 05, 2018

Keywords: Superfluidity and superconductivity

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Thermoelectric anisotropy in the iron-based superconductor $\mathrm{Ba}{({\mathrm{Fe}}_{1−x}{\mathrm{Co}}_{x})}_{2}{\mathrm{As}}_{2}$ (2018)

Marcin Matusiak, Krzysztof Rogacki, and Thomas Wolf

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-06-06

Description: Author(s): Marcin Matusiak, Krzysztof Rogacki, and Thomas Wolf Nematicity turns out to be a surprisingly common form of self-organization in strongly correlated electronic systems. Its presence along with superconductivity raises the question about a mutual relation between these two types of electronic order as well as about mechanisms that leads to their formation. Here, the authors show that the in-plane anisotropy of the Nernst effect (Δ ν / T ) in detwinned Ba(Fe 1 − x Co x ) 2 As 2 single crystals emerges at a temperature much higher than the temperature of the magnetic transition (TSDW). Furthermore, the temperature dependence of Δ ν / T retains its exponential character below and above TSDW, which suggests that the origin of nematicity might be something different from magnetic. [Phys. Rev. B 97, 220501(R)] Published Tue Jun 05, 2018

Keywords: Superfluidity and superconductivity

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Resilience of scrambling measurements (2018)

Brian Swingle and Nicole Yunger Halpern

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-15

Description: Author(s): Brian Swingle and Nicole Yunger Halpern Most experimental protocols for measuring scrambling require time evolution with a Hamiltonian and with the Hamiltonian's negative counterpart (backward time evolution). Engineering controllable quantum many-body systems for which such forward and backward evolution is possible is a significant expe... [Phys. Rev. A 97, 062113] Published Thu Jun 14, 2018

Keywords: Fundamental concepts

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Post-Ehrenfest many-body quantum interferences in ultracold atoms far out of equilibrium (2018)

Steven Tomsovic, Peter Schlagheck, Denis Ullmo, Juan-Diego Urbina, and Klaus Richter

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-15

Description: Author(s): Steven Tomsovic, Peter Schlagheck, Denis Ullmo, Juan-Diego Urbina, and Klaus Richter Far out-of-equilibrium many-body quantum dynamics in isolated systems necessarily generates interferences beyond an Ehrenfest timescale, where quantum and classical expectation values diverge. Of great recent interest is the role these interferences play in the spreading of quantum information acros... [Phys. Rev. A 97, 061606(R)] Published Thu Jun 14, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Electron Phonon Coupling versus Photoelectron Energy Loss at the Origin of Replica Bands in Photoemission of FeSe on ${\mathrm{SrTiO}}_{3}$ (2018)

Fengmiao Li and George A. Sawatzky

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-06-06

Description: Author(s): Fengmiao Li and George A. Sawatzky The recent observation of replica bands in single-layer FeSe / SrTiO 3 by angle-resolved photoemission spectroscopy (ARPES) has triggered intense discussions concerning the potential influence of the FeSe electrons coupling with substrate phonons on the superconducting transition temperature. Here we p... [Phys. Rev. Lett. 120, 237001] Published Tue Jun 05, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Work and reversibility in quantum thermodynamics (2018)

Álvaro M. Alhambra, Stephanie Wehner, Mark M. Wilde, and Mischa P. Woods

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-16

Description: Author(s): Álvaro M. Alhambra, Stephanie Wehner, Mark M. Wilde, and Mischa P. Woods It is a central question in quantum thermodynamics to determine how irreversible is a process that transforms an initial state ρ to a final state σ and whether such irreversibility can be thought of as a useful resource. For example, we might ask how much work can be obtained by thermalizing ρ to a ... [Phys. Rev. A 97, 062114] Published Fri Jun 15, 2018

Keywords: Fundamental concepts

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Experimental retrodiction of trajectories of single photons in double interferometers (2018)

Yuan Yuan, Zhibo Hou, Kang-Da Wu, Guo-Yong Xiang, Chuan-Feng Li, and Guang-Can Guo

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-16

Description: Author(s): Yuan Yuan, Zhibo Hou, Kang-Da Wu, Guo-Yong Xiang, Chuan-Feng Li, and Guang-Can Guo When a photon passes through an interferometer, quantum mechanics does not provide a clear answer as to its past. Quantum retrodiction is a quantitative theory, which endeavors to make statements about the past of a system based on present knowledge. Quantum retrodiction may be used to analyze the p... [Phys. Rev. A 97, 062115] Published Fri Jun 15, 2018

Keywords: Fundamental concepts

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Totally destructive interference for permutation-symmetric many-particle states (2018)

Christoph Dittel, Gabriel Dufour, Mattia Walschaers, Gregor Weihs, Andreas Buchleitner, and Robert Keil

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-16

Description: Author(s): Christoph Dittel, Gabriel Dufour, Mattia Walschaers, Gregor Weihs, Andreas Buchleitner, and Robert Keil Interference is at the heart of quantum mechanics and is most intriguing in the complexity of multiple interfering particles. Here fundamental symmetry considerations are used to develop a general formalism for understanding the totally destructive interference of many bosons and fermions. [Phys. Rev. A 97, 062116] Published Fri Jun 15, 2018

Keywords: Fundamental concepts

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Nonlocal pair correlations in Lieb-Liniger gases: A unified nonperturbative approach from weak degeneracy to high temperatures (2018)

Benjamin Geiger, Quirin Hummel, Juan Diego Urbina, and Klaus Richter

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-16

Description: Author(s): Benjamin Geiger, Quirin Hummel, Juan Diego Urbina, and Klaus Richter We present analytical results for the nonlocal pair correlations in one-dimensional bosonic systems with repulsive contact interactions that are uniformly valid from the classical regime of high temperatures down to weak quantum degeneracy entering the regime of ultralow temperatures. By using the i... [Phys. Rev. A 97, 063612] Published Fri Jun 15, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Wigner function of noninteracting trapped fermions (2018)

David S. Dean, Pierre Le Doussal, Satya N. Majumdar, and Grégory Schehr

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-16

Description: Author(s): David S. Dean, Pierre Le Doussal, Satya N. Majumdar, and Grégory Schehr The Wigner function is studied for trapped noninteracting fermions. Universal scaling behavior of the function, independent of the trapping potential and the spatial dimension, is found at both zero and finite temperatures. [Phys. Rev. A 97, 063614] Published Fri Jun 15, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Dimer-dimer zero crossing and dilute dimerized liquid in a one-dimensional mixture (2018)

A. Pricoupenko and D. S. Petrov

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-16

Description: Author(s): A. Pricoupenko and D. S. Petrov We consider the system of dimers formed in a one-dimensional mass-balanced Bose-Bose mixture of species σ = ↑ , ↓ with attractive interspecies and repulsive intraspecies contact interactions. In the plane parametrized by the ratios of the coupling constants g ↑ ↑ / | g ↑ ↓ | and g ↓ ↓ / | g ↑ ↓ | we trace out the curve... [Phys. Rev. A 97, 063616] Published Fri Jun 15, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Unusual phonon density of states and response to the superconducting transition in the In-doped topological crystalline insulator ${\mathrm{Pb}}_{0.5}{\mathrm{Sn}}_{0.5}\mathrm{Te}$ (2018)

Kejing Ran, Ruidan Zhong, Tong Chen, Yuan Gan, Jinghui Wang, B. L. Winn, A. D. Christianson, Shichao Li, Zhen Ma, Song Bao, Zhengwei Cai, Guangyong Xu, J. M. Tranquada, Genda Gu, Jian Sun, and Jinsheng Wen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-06-16

Description: Author(s): Kejing Ran, Ruidan Zhong, Tong Chen, Yuan Gan, Jinghui Wang, B. L. Winn, A. D. Christianson, Shichao Li, Zhen Ma, Song Bao, Zhengwei Cai, Guangyong Xu, J. M. Tranquada, Genda Gu, Jian Sun, and Jinsheng Wen We present inelastic neutron scattering results of phonons in ( Pb 0.5 Sn 0.5 ) 1 − x In x Te powders, with x = 0 and 0.3. The x = 0 sample is a topological crystalline insulator, and the x = 0.3 sample is a superconductor with a bulk superconducting transition temperature T c of 4.7 K. In both samples, we observe un... [Phys. Rev. B 97, 220502(R)] Published Fri Jun 15, 2018

Keywords: Superfluidity and superconductivity

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${Z}_{N}$ Berry Phases in Symmetry Protected Topological Phases (2018)

Toshikaze Kariyado, Takahiro Morimoto, and Yasuhiro Hatsugai

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-06-16

Description: Author(s): Toshikaze Kariyado, Takahiro Morimoto, and Yasuhiro Hatsugai We show that the Z N Berry phase (Berry phase quantized into 2 π / N ) provides a useful tool to characterize symmetry protected topological phases with correlation that can be directly computed through numerics of a relatively small system size. The Z N Berry phase is defined in a N − 1 -dimensional paramet... [Phys. Rev. Lett. 120, 247202] Published Fri Jun 15, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Light polarization measurements in tests of macrorealism (2018)

Eugenio Roldán, Johannes Kofler, and Carlos Navarrete-Benlloch

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-19

Description: Author(s): Eugenio Roldán, Johannes Kofler, and Carlos Navarrete-Benlloch According to the world view of macrorealism, the properties of a given system exist prior to and independent of measurement, which is incompatible with quantum mechanics. Leggett and Garg put forward a practical criterion capable of identifying violations of macrorealism, and so far experiments perf... [Phys. Rev. A 97, 062117] Published Mon Jun 18, 2018

Keywords: Fundamental concepts

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Numerical optimal control of spin systems at zero magnetic field (2018)

Min Jiang, Ji Bian, Xiaomei Liu, Hengyan Wang, Yunlan Ji, Bo Zhang, Xinhua Peng, and Jiangfeng Du

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-19

Description: Author(s): Min Jiang, Ji Bian, Xiaomei Liu, Hengyan Wang, Yunlan Ji, Bo Zhang, Xinhua Peng, and Jiangfeng Du Zero-field nuclear magnetic resonance (NMR) has been recently developed as a complementary tool for nondestructive structural investigations of matter. However, precise and efficient control in such systems is still at the beginning. Based on the controllability of spin systems, we theoretically stu... [Phys. Rev. A 97, 062118] Published Mon Jun 18, 2018

Keywords: Fundamental concepts

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Weak metal-metal transition in the vanadium oxytelluride ${\mathrm{Rb}}_{1−δ}{\mathrm{V}}_{2}{\mathrm{Te}}_{2}\mathrm{O}$ (2018)

Abduweli Ablimit, Yun-Lei Sun, Hao Jiang, Si-Qi Wu, Ya-Bin Liu, and Guang-Han Cao

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-06-21

Description: Author(s): Abduweli Ablimit, Yun-Lei Sun, Hao Jiang, Si-Qi Wu, Ya-Bin Liu, and Guang-Han Cao We report the synthesis, crystal structure, physical properties, and first-principles calculations of a vanadium-based oxytelluride Rb 1 − δ V 2 Te 2 O ( δ ≈ 0.2 ). The crystal structure bears two-dimensional V 2 O square nets sandwiched with tellurium layers, mimicking the structural motifs of cuprate and iron-b... [Phys. Rev. B 97, 214517] Published Wed Jun 20, 2018

Keywords: Superfluidity and superconductivity

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Large nematic susceptibility in the double-$Q\phantom{\rule{0.16em}{0ex}}{C}_{4}$ magnetic phase of ${\mathrm{Ba}}_{1−x}{\mathrm{Na}}_{x}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ (2018)

Liran Wang, Mingquan He, Frédéric Hardy, Peter Adelmann, Thomas Wolf, Michael Merz, Peter Schweiss, and Christoph Meingast

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-06-23

Description: Author(s): Liran Wang, Mingquan He, Frédéric Hardy, Peter Adelmann, Thomas Wolf, Michael Merz, Peter Schweiss, and Christoph Meingast The nematic susceptibility of Ba 1 − x Na x Fe 2 As 2 single crystals is studied by measuring the Young's modulus using a three-point-bending setup in a capacitance dilatometer over a wide doping range. Particular emphasis is placed on the behavior within the double- Q antiferromagnetic C 4 re-entrant phase. H... [Phys. Rev. B 97, 224518] Published Fri Jun 22, 2018

Keywords: Superfluidity and superconductivity

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Barrier-traversal-time operator and the time-energy uncertainty relation (2018)

Denny Lane B. Sombillo and Eric A. Galapon

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-06-28

Description: Author(s): Denny Lane B. Sombillo and Eric A. Galapon A general barrier-traversal-time operator is constructed using the time-of-arrival formalism. We study the operator's dynamics and determine the role played by the time-energy commutation relation. It turns out that similar dynamics is observed whether the traversal-time operator is canonically conj... [Phys. Rev. A 97, 062127] Published Wed Jun 27, 2018

Keywords: Fundamental concepts

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Topology of Disconnected Elementary Band Representations (2018)

Jennifer Cano, Barry Bradlyn, Zhijun Wang, L. Elcoro, M. G. Vergniory, C. Felser, M. I. Aroyo, and B. Andrei Bernevig

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-06-28

Description: Author(s): Jennifer Cano, Barry Bradlyn, Zhijun Wang, L. Elcoro, M. G. Vergniory, C. Felser, M. I. Aroyo, and B. Andrei Bernevig A new topological invariant—a movable but unremovable Dirac cone—is identified by considering symmorphic and non-symmorphic space groups of gapped elementary band representations. [Phys. Rev. Lett. 120, 266401] Published Wed Jun 27, 2018

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Quantum Hall Effect with Composites of Magnetic Flux Tubes and Charged Particles (2018)

Marija Todorić, Dario Jukić, Danko Radić, Marin Soljačić, and Hrvoje Buljan

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-06-29

Description: Author(s): Marija Todorić, Dario Jukić, Danko Radić, Marin Soljačić, and Hrvoje Buljan Composites formed from charged particles and magnetic flux tubes, proposed by Wilczek, are one model for anyons—particles obeying fractional statistics. Here we propose a scheme for realizing charged flux tubes, in which a charged object with an intrinsic magnetic dipole moment is placed between two... [Phys. Rev. Lett. 120, 267201] Published Thu Jun 28, 2018

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Testing nonclassicality with exact Wigner currents for an anharmonic quantum system (2018)

Alex E. Bernardini

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-27

Description: Author(s): Alex E. Bernardini Phase-space features of the Wigner flow for an anharmonic quantum system driven by the harmonic oscillator potential modified by the addition of an inverse square (one-dimensional Coulomb-like) contribution are analytically described in terms of Wigner functions and Wigner currents. Reporting about ... [Phys. Rev. A 98, 052128] Published Mon Nov 26, 2018

Keywords: Fundamental concepts

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Dimensional crossover for the beyond-mean-field correction in Bose gases (2018)

Tobias Ilg, Jan Kumlin, Luis Santos, Dmitry S. Petrov, and Hans Peter Büchler

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-27

Description: Author(s): Tobias Ilg, Jan Kumlin, Luis Santos, Dmitry S. Petrov, and Hans Peter Büchler We present a detailed beyond-mean-field analysis of a weakly interacting Bose gas in the crossover from three to low dimensions. We find an analytical solution for the energy and provide a clear qualitative picture of the crossover in the case of a box potential with periodic boundary conditions. We... [Phys. Rev. A 98, 051604(R)] Published Mon Nov 26, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Gamma-ray vortices emitted from nonlinear inverse Thomson scattering of a two-wavelength laser beam (2018)

Yoshitaka Taira and Masahiro Katoh

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-27

Description: Author(s): Yoshitaka Taira and Masahiro Katoh We develop a classical theory of nonlinear inverse Thomson scattering of a two-wavelength laser beam, which is valid for laser beams with linear or circular polarization and arbitrary intensity and wavelength. We reveal that an electron inside a circularly polarized two-wavelength laser field underg... [Phys. Rev. A 98, 052130] Published Mon Nov 26, 2018

Keywords: Fundamental concepts

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Quantum Zeno effect at finite measurement strength and frequency (2018)

L. Lerner

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-27

Description: Author(s): L. Lerner The evolution of a system subject to measurement is restricted to Zeno subspaces of the measurement Hamiltonian in the limit of strong measurements k in a phenomenon known as the quantum Zeno effect (QZE). As the limit constrains QZE to the lowest orders of perturbation in 1 / k , we derive general exp... [Phys. Rev. A 98, 052132] Published Mon Nov 26, 2018

Keywords: Fundamental concepts

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Order parameter and detection for a finite ensemble of crystallized one-dimensional dipolar bosons in optical lattices (2018)

Budhaditya Chatterjee and Axel U. J. Lode

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-27

Description: Author(s): Budhaditya Chatterjee and Axel U. J. Lode We explore the ground-state properties of a few bosons with dipole-dipole interactions in a one-dimensional optical lattice. For comparatively strong interactions, a transition from a Mott-insulator state to a crystal state occurs. Herein, we provide a detailed characterization and a detection proto... [Phys. Rev. A 98, 053624] Published Mon Nov 26, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Probing the Combined Electromagnetic Local Density of Optical States with Quantum Emitters Supporting Strong Electric and Magnetic Transitions (2018)

Dongfang Li, Sinan Karaveli, Sébastien Cueff, Wenhao Li, and Rashid Zia

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-11-29

Description: Author(s): Dongfang Li, Sinan Karaveli, Sébastien Cueff, Wenhao Li, and Rashid Zia We experimentally demonstrate that the radiative decay rate of a quantum emitter is determined by the combined electric and magnetic local density of optical states (LDOS). A Drexhage-style experiment was performed for two distinct quantum emitters, divalent nickel ions in magnesium oxide and trival... [Phys. Rev. Lett. 121, 227403] Published Wed Nov 28, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Negative-temperature-state relaxation and reservoir-assisted quantum entanglement in double-spin-domain systems (2018)

Yusuke Hama, Emi Yukawa, William J. Munro, and Kae Nemoto

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-28

Description: Author(s): Yusuke Hama, Emi Yukawa, William J. Munro, and Kae Nemoto Spin collective phenomena including superradiance are even today being intensively investigated with experimental tests performed based on state-of-the-art quantum technologies. Such attempts are not only for the simple experimental verification of predictions from the last century, but also as a mo... [Phys. Rev. A 98, 052133] Published Tue Nov 27, 2018

Keywords: Fundamental concepts

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Chiral Majorana edge states in the vortex core of a $p+ip$ Fermi superfluid (2018)

Jing-Bo Wang, Wei Yi, and Jian-Song Pan

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-28

Description: Author(s): Jing-Bo Wang, Wei Yi, and Jian-Song Pan We study Majorana modes in the vortex core of a two-dimensional p + i p Fermi superfluid interacting with a Bose-Einstein condensate. Under a repulsive s -wave contact interaction between fermions and bosons, fermions are depleted from the vortex core when the bosonic density becomes sufficiently high. ... [Phys. Rev. A 98, 053630] Published Tue Nov 27, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Josephson coupling in the dissipative state of a thermally hysteretic $μ$-SQUID (2018)

Sourav Biswas, Clemens B. Winkelmann, Hervé Courtois, and Anjan K. Gupta

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-11-28

Description: Author(s): Sourav Biswas, Clemens B. Winkelmann, Hervé Courtois, and Anjan K. Gupta Micron-sized superconducting interference devices ( μ -SQUIDs) based on constrictions optimized for minimizing thermal runaway are shown to exhibit voltage oscillations with applied magnetic flux despite their hysteretic behavior. We explain this remarkable feature by a significant supercurrent contri... [Phys. Rev. B 98, 174514] Published Tue Nov 27, 2018

Keywords: Superfluidity and superconductivity

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Catching and reversing quantum jumps and thermodynamics of quantum trajectories (2018)

Juan P. Garrahan and Mădălin Guţă

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-11-30

Description: Author(s): Juan P. Garrahan and Mădălin Guţă A recent experiment by Minev et al. , arXiv:1803.00545 demonstrated that in a dissipative (artificial) three-level atom with strongly intermittent dynamics it is possible to “catch and reverse” a quantum jump “midflight”: by the conditional application of a unitary perturbation after a fixed time wit... [Phys. Rev. A 98, 052137] Published Thu Nov 29, 2018

Keywords: Fundamental concepts

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Plasmon-Assisted Resonant Electron Tunneling in a Scanning Tunneling Microscope Junction (2018)

Shuyi Liu, Martin Wolf, and Takashi Kumagai

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-12-01

Description: Author(s): Shuyi Liu, Martin Wolf, and Takashi Kumagai We report plasmon-assisted resonant electron tunneling from a Ag or Au tip to field emission resonances (FERs) of a Ag(111) surface induced by cw laser excitation of a scanning tunneling microscope (STM) junction at visible wavelengths. As a hallmark of the plasmon-assisted resonant tunneling, we ob... [Phys. Rev. Lett. 121, 226802] Published Fri Nov 30, 2018

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Proving genuine multiparticle entanglement from separable nearest-neighbor marginals (2018)

Marius Paraschiv, Nikolai Miklin, Tobias Moroder, and Otfried Gühne

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-04

Description: Author(s): Marius Paraschiv, Nikolai Miklin, Tobias Moroder, and Otfried Gühne We address the question of whether or not global entanglement of a quantum state can be inferred from local properties. Specifically, we are interested in genuinely multiparticle entangled states whose two-body marginals are all separable, but where the entanglement can be proven using knowledge of ... [Phys. Rev. A 98, 062102] Published Mon Dec 03, 2018

Keywords: Fundamental concepts

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Pseudo-Goldstone Gaps and Order-by-Quantum Disorder in Frustrated Magnets (2018)

Jeffrey G. Rau, Paul A. McClarty, and Roderich Moessner

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-12-04

Description: Author(s): Jeffrey G. Rau, Paul A. McClarty, and Roderich Moessner In systems with competing interactions, continuous degeneracies can appear which are accidental, in that they are not related to any symmetry of the Hamiltonian. Accordingly, the pseudo-Goldstone modes associated with these degeneracies are also unprotected. Indeed, through a process known as “order... [Phys. Rev. Lett. 121, 237201] Published Mon Dec 03, 2018

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Generating macroscopic superpositions with interacting Bose-Einstein condensates: Multimode speedups and speed limits (2018)

Samuel P. Nolan and Simon A. Haine

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-05

Description: Author(s): Samuel P. Nolan and Simon A. Haine We theoretically investigate the effect of multimode dynamics on the creation of macroscopic superposition states (spin-cat states) in Bose-Einstein condensates via one-axis twisting. A two-component Bose-Einstein condensate naturally realizes an effective one-axis twisting interaction, under which ... [Phys. Rev. A 98, 063606] Published Tue Dec 04, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Quantum reflection of rare-gas atoms and clusters from a grating (2018)

G. Rojas-Lorenzo, J. Rubayo-Soneira, S. Miret-Artés, and E. Pollak

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-05

Description: Author(s): G. Rojas-Lorenzo, J. Rubayo-Soneira, S. Miret-Artés, and E. Pollak Quantum reflection is a universal property of atoms and molecules when scattered from surfaces in ultracold collisions. Recent experimental work has documented the quantum reflection and diffraction of He atoms, dimers, trimers, and neon atoms when reflected from a grating. Conditions for the observ... [Phys. Rev. A 98, 063604] Published Tue Dec 04, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Gauge-potential-induced rotation of spin-orbit-coupled Bose-Einstein condensates (2018)

Jingjing Jin, Wei Han, and Suying Zhang

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-05

Description: Author(s): Jingjing Jin, Wei Han, and Suying Zhang We demonstrate that a spin-orbit-coupled Bose-Einstein condensate can be effectively rotated by adding a real magnetic field to inputting gauge angular momentum, which is distinctly different from the traditional ways of rotation by stirring or Raman laser dressing to inputting canonical angular mom... [Phys. Rev. A 98, 063607] Published Tue Dec 04, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Extended quantum Maxwell demon acting over macroscopic distances (2018)

A. V. Lebedev, G. B. Lesovik, V. M. Vinokur, and G. Blatter

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-05

Description: Author(s): A. V. Lebedev, G. B. Lesovik, V. M. Vinokur, and G. Blatter A quantum Maxwell demon is a device that can lower the entropy of a quantum system by providing it with purity. The functionality of such a quantum demon is rooted in a quantum-mechanical SWAP operation exchanging mixed and pure states. We describe the setup and performance of a quantum Maxwell demo... [Phys. Rev. B 98, 214502] Published Tue Dec 04, 2018

Keywords: Superfluidity and superconductivity

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Suppression of superfluid stiffness near a Lifshitz-point instability to finite-momentum superconductivity (2018)

Jonatan Wårdh, Brian M. Andersen, and Mats Granath

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-05

Description: Author(s): Jonatan Wårdh, Brian M. Andersen, and Mats Granath We derive the effective Ginzburg-Landau (GL) theory for finite-momentum [Fulde-Ferrell-Larkin-Ovchinnikov/pair-density wave (FFLO/PDW)] superconductivity without spin population imbalance from a model with local attraction and repulsive pair hopping. We find that the GL free energy must include up t... [Phys. Rev. B 98, 224501] Published Tue Dec 04, 2018

Keywords: Superfluidity and superconductivity

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Chiral supercurrent through a quantum Hall weak link (2018)

Yahya Alavirad, Junhyun Lee, Ze-Xun Lin, and Jay D. Sau

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-07

Description: Author(s): Yahya Alavirad, Junhyun Lee, Ze-Xun Lin, and Jay D. Sau We use an effective model to calculate properties of the supercurrent carried by chiral edge states of a quantum Hall weak link. This “chiral” supercurrent is qualitatively distinct from the usual Josephson supercurrent in that it cannot be mediated by a single edge alone, i.e., both right- and left... [Phys. Rev. B 98, 214504] Published Thu Dec 06, 2018

Keywords: Superfluidity and superconductivity

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Topological edge states in Rashba-Dresselhaus spin-orbit-coupled atoms in a Zeeman lattice (2018)

C. Li, F. Ye, X. Chen, Y. V. Kartashov, L. Torner, and V. V. Konotop

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-08

Description: Author(s): C. Li, F. Ye, X. Chen, Y. V. Kartashov, L. Torner, and V. V. Konotop We address the impact of spin-orbit coupling on the existence and properties of topological edge states of cold neutral atoms and Bose-Einstein condensates loaded in honeycomb Zeeman lattices—lattices where the spinor components are placed in potentials having opposite signs. We find that the type o... [Phys. Rev. A 98, 061601(R)] Published Fri Dec 07, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Experimental evaluation of the nonclassical relation between measurement errors using entangled photon pairs as a probe (2018)

Masataka Iinuma, Masayuki Nakano, Holger F. Hofmann, and Yutaro Suzuki

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-08

Description: Author(s): Masataka Iinuma, Masayuki Nakano, Holger F. Hofmann, and Yutaro Suzuki We have experimentally evaluated the nonclassical relation between measurement errors in a joint measurement of two noncommuting polarizations by using entangled photon pairs as a probe. The joint measurement was realized by filtering polarization directions that are sensitive to both of the two tar... [Phys. Rev. A 98, 062109] Published Fri Dec 07, 2018

Keywords: Fundamental concepts

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Measuring the local gravitational field using survival resonances in a dissipatively driven atom-optics system (2018)

Shijie Chai, Julia Fekete, and Mikkel F. Andersen

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-11

Description: Author(s): Shijie Chai, Julia Fekete, and Mikkel F. Andersen We do a proof-of-principle demonstration of an atomic gravimeter based on survival resonances of dissipatively driven atoms. Exposing laser-cooled atoms to a sequence of near-resonant standing-wave light pulses reveals survival resonances when the standing-wave interference pattern accelerates. The ... [Phys. Rev. A 98, 063614] Published Mon Dec 10, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Mean-field theory for superconductivity in twisted bilayer graphene (2018)

Teemu J. Peltonen, Risto Ojajärvi, and Tero T. Heikkilä

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-11

Description: Author(s): Teemu J. Peltonen, Risto Ojajärvi, and Tero T. Heikkilä Recent experiments show how a bilayer graphene twisted around a certain magic angle becomes superconducting as it is doped into a region with approximate flat bands. We investigate the mean-field s -wave superconducting state in such a system and show how the state evolves as the twist angle is tuned... [Phys. Rev. B 98, 220504(R)] Published Mon Dec 10, 2018

Keywords: Superfluidity and superconductivity

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Anomalous normal-state resistivity in superconducting $\mathrm{L}{\mathrm{a}}_{2−x}\mathrm{C}{\mathrm{e}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$: Fermi liquid or strange metal? (2018)

Tarapada Sarkar, Richard L. Greene, and S. Das Sarma

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-11

Description: Author(s): Tarapada Sarkar, Richard L. Greene, and S. Das Sarma We present experimental results for the in-plane resistivity of the electron-doped cuprate superconductor L a 2 − x C e x Cu O 4 above its transition temperature T c as a function of Ce doping x and temperature. For the doping x between 0.11 and 0.17, where T c varies from 30 K ( x = 0.11 ) to 5 K ( x = 0.17 ), we find... [Phys. Rev. B 98, 224503] Published Mon Dec 10, 2018

Keywords: Superfluidity and superconductivity

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Imaging the Local Charge Environment of Nitrogen-Vacancy Centers in Diamond (2018)

T. Mittiga, S. Hsieh, C. Zu, B. Kobrin, F. Machado, P. Bhattacharyya, N. Z. Rui, A. Jarmola, S. Choi, D. Budker, and N. Y. Yao

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-12-13

Description: Author(s): T. Mittiga, S. Hsieh, C. Zu, B. Kobrin, F. Machado, P. Bhattacharyya, N. Z. Rui, A. Jarmola, S. Choi, D. Budker, and N. Y. Yao Nitrogen-vacancy centers in diamond are found to be more affected by local charge than expected, which has implications for the use of the defects as quantum sensors. [Phys. Rev. Lett. 121, 246402] Published Wed Dec 12, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Pressure-induced multiple phase transformations of the ${\mathrm{BaBi}}_{3}$ superconductor (2018)

Li Xiang, Raquel A. Ribeiro, Udhara S. Kaluarachchi, Elena Gati, Manh Cuong Nguyen, Cai-Zhuang Wang, Kai-Ming Ho, Sergey L. Bud'ko, and Paul C. Canfield

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-14

Description: Author(s): Li Xiang, Raquel A. Ribeiro, Udhara S. Kaluarachchi, Elena Gati, Manh Cuong Nguyen, Cai-Zhuang Wang, Kai-Ming Ho, Sergey L. Bud'ko, and Paul C. Canfield Measurements of temperature-dependent resistance and magnetization under hydrostatic pressures up to 2.13 GPa are reported for single-crystalline, superconducting BaBi 3 . A temperature-pressure phase diagram is determined and the results suggest three different superconducting phases α , β , and γ in t... [Phys. Rev. B 98, 214509] Published Thu Dec 13, 2018

Keywords: Superfluidity and superconductivity

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$z=2$ Quantum Critical Dynamics in a Spin Ladder (2018)

D. Blosser, V. K. Bhartiya, D. J. Voneshen, and A. Zheludev

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-12-14

Description: Author(s): D. Blosser, V. K. Bhartiya, D. J. Voneshen, and A. Zheludev By means of inelastic neutron scattering we investigate finite temperature dynamics in the quantum spin ladder compound ( C 5 H 12 N ) 2 CuBr 4 (BPCB) near the magnetic field induced quantum critical point with dynamical exponent z = 2 . We observe universal finite-temperature scaling of the transverse local dy... [Phys. Rev. Lett. 121, 247201] Published Thu Dec 13, 2018

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Realization of continuous electron doping in bulk iron selenides and identification of a new superconducting zone (2018)

R. J. Sun, Y. Quan, S. F. Jin, Q. Z. Huang, H. Wu, L. Zhao, L. Gu, Z. P. Yin, and X. L. Chen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-13

Description: Author(s): R. J. Sun, Y. Quan, S. F. Jin, Q. Z. Huang, H. Wu, L. Zhao, L. Gu, Z. P. Yin, and X. L. Chen Iron selenide superconductors exhibit unique characteristics distinct from iron pnictides, especially in the electron-doped region. Here, the authors report the synthesis of a new family of Li x (C 3 N 2 H 10 ) 0 . 37 FeSe materials, which features a continuous superconducting dome harboring a Lifshitz transition within the wide range of 0.06 ≤ x ≤ 0.68. Under electron doping, the anion height of FeSe layers deviates linearly away from the optimized values of pnictides. This feature leads to a new superconducting zone with unique electronic structures and strong orbital-selective electronic correlation. [Phys. Rev. B 98, 214508] Published Wed Dec 12, 2018

Keywords: Superfluidity and superconductivity

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Interactions and Magnetotransport through Spin-Valley Coupled Landau Levels in Monolayer ${\mathrm{MoS}}_{2}$ (2018)

Riccardo Pisoni, Andor Kormányos, Matthew Brooks, Zijin Lei, Patrick Back, Marius Eich, Hiske Overweg, Yongjin Lee, Peter Rickhaus, Kenji Watanabe, Takashi Taniguchi, Atac Imamoglu, Guido Burkard, Thomas Ihn, and Klaus Ensslin

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-12-14

Description: Author(s): Riccardo Pisoni, Andor Kormányos, Matthew Brooks, Zijin Lei, Patrick Back, Marius Eich, Hiske Overweg, Yongjin Lee, Peter Rickhaus, Kenji Watanabe, Takashi Taniguchi, Atac Imamoglu, Guido Burkard, Thomas Ihn, and Klaus Ensslin The strong spin-orbit coupling and the broken inversion symmetry in monolayer transition metal dichalcogenides results in spin-valley coupled band structures. Such a band structure leads to novel applications in the fields of electronics and optoelectronics. Density functional theory calculations as... [Phys. Rev. Lett. 121, 247701] Published Thu Dec 13, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Strongly Enhanced Berry Dipole at Topological Phase Transitions in BiTeI (2018)

Jorge I. Facio, Dmitri Efremov, Klaus Koepernik, Jhih-Shih You, Inti Sodemann, and Jeroen van den Brink

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-12-15

Description: Author(s): Jorge I. Facio, Dmitri Efremov, Klaus Koepernik, Jhih-Shih You, Inti Sodemann, and Jeroen van den Brink Transitions between topologically distinct electronic states have been predicted in different classes of materials and observed in some. A major goal is the identification of measurable properties that directly expose the topological nature of such transitions. Here, we focus on the giant Rashba mat... [Phys. Rev. Lett. 121, 246403] Published Fri Dec 14, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Incompatible measurements in a class of general probabilistic theories (2018)

Anna Jenčová

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-26

Description: Author(s): Anna Jenčová We study incompatibility of measurements and its relation to steering and nonlocality in a class of finite-dimensional general probabilistic theories (GPTs). The basic idea is to represent finite collections of measurements as affine maps of a state space into a polysimplex and show that incompatibi... [Phys. Rev. A 98, 012133] Published Wed Jul 25, 2018

Keywords: Fundamental concepts

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Strengthening weak measurements of qubit out-of-time-order correlators (2018)

Justin Dressel, José Raúl González Alonso, Mordecai Waegell, and Nicole Yunger Halpern

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-26

Description: Author(s): Justin Dressel, José Raúl González Alonso, Mordecai Waegell, and Nicole Yunger Halpern For systems of controllable qubits, we provide a method for experimentally obtaining a useful class of multitime correlators using sequential generalized measurements of arbitrary strength. Specifically, if a correlator can be expressed as an average of nested (anti)commutators of operators that squ... [Phys. Rev. A 98, 012132] Published Wed Jul 25, 2018

Keywords: Fundamental concepts

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Lorentz-boost eigenmodes (2018)

Konstantin Y. Bliokh

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-31

Description: Author(s): Konstantin Y. Bliokh Plane waves and cylindrical or spherical vortex modes are important sets of solutions of quantum and classical wave equations. These are eigenmodes of the energy-momentum and angular-momentum operators, i.e., generators of spacetime translations and spatial rotations, respectively. Here we describe ... [Phys. Rev. A 98, 012143] Published Mon Jul 30, 2018

Keywords: Fundamental concepts

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Stabilizing Fulde-Ferrell-Larkin-Ovchinnikov superfluidity with long-range interactions in a mixed-dimensional Bose-Fermi system (2018)

Jonatan Melkær Midtgaard and Georg M. Bruun

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-07-25

Description: Author(s): Jonatan Melkær Midtgaard and Georg M. Bruun We analyze the stability of inhomogeneous superfluid phases in a system consisting of identical fermions confined in two layers that are immersed in a Bose-Einstein condensate (BEC). The fermions in the two layers interact via an induced interaction mediated by the BEC, which gives rise to pairing. ... [Phys. Rev. A 98, 013624] Published Tue Jul 24, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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First-principles study of superconductivity in the two- and three-dimensional forms of ${\mathrm{PbTiSe}}_{2}$: Suppressed charge density wave in $1T\text{−}{\mathrm{TiSe}}_{2}$ (2018)

Bao-Tian Wang, Peng-Fei Liu, Jing-Jing Zheng, Wen Yin, and Fangwei Wang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-25

Description: Author(s): Bao-Tian Wang, Peng-Fei Liu, Jing-Jing Zheng, Wen Yin, and Fangwei Wang Layered 1 T − TiSe 2 has attracted much interest for the competition of charge density wave (CDW) and superconductivity in its bulk and even monolayer forms. Here we perform first-principles calculations of the electronic structure, phonon dispersion, and electron-phonon coupling of the Pb-intercalated ... [Phys. Rev. B 98, 014514] Published Tue Jul 24, 2018

Keywords: Superfluidity and superconductivity

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Effect of electrons scattered by optical phonons on superconductivity in $M{\mathrm{H}}_{3}$ ($M=\mathrm{S}$, Ti, V, Se) (2018)

Quan Zhuang, Xilian Jin, Tian Cui, Die Zhang, Ying Li, Xin Li, Kuo Bao, and Bingbing Liu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-07-25

Description: Author(s): Quan Zhuang, Xilian Jin, Tian Cui, Die Zhang, Ying Li, Xin Li, Kuo Bao, and Bingbing Liu For exploring the superconductivity mechanisms and seeking potential high-temperature superconductors in hydrogen-rich compounds, we perform a systematical investigation of the phase diagram, crystal structures, electronic properties, and electron-phonon coupling (EPC) of titanium hydrides under hig... [Phys. Rev. B 98, 024514] Published Tue Jul 24, 2018

Keywords: Superfluidity and superconductivity

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Fast quantum driving in two-level systems with interaction and nonlinear sweep (2018)

Fu-Quan Dou, Jie Liu, and Li-Bin Fu

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-02

Description: Author(s): Fu-Quan Dou, Jie Liu, and Li-Bin Fu We investigate high-fidelity fast quantum driving in a generalized nonlinear two-level system with both interparticle interaction and nonlinear energy sweep. We find that fast quantum dynamics depend on the interaction, energy sweep parameter, and energy sweep strength. We show that the driving prot... [Phys. Rev. A 98, 022102] Published Wed Aug 01, 2018

Keywords: Fundamental concepts

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Tripartite-entanglement detection through tripartite quantum steering in one-sided and two-sided device-independent scenarios (2018)

C. Jebaratnam, Debarshi Das, Arup Roy, Amit Mukherjee, Some Sankar Bhattacharya, Bihalan Bhattacharya, Alberto Riccardi, and Debasis Sarkar

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-02

Description: Author(s): C. Jebaratnam, Debarshi Das, Arup Roy, Amit Mukherjee, Some Sankar Bhattacharya, Bihalan Bhattacharya, Alberto Riccardi, and Debasis Sarkar In the present work we study tripartite quantum steering of quantum correlations arising from two local dichotomic measurements on each side in the two types of partially device-independent scenarios: the one-sided device-independent scenario where one of the parties performs untrusted measurements ... [Phys. Rev. A 98, 022101] Published Wed Aug 01, 2018

Keywords: Fundamental concepts

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Self-averaging of random quantum dynamics (2018)

Marcin Łobejko, Jerzy Dajka, and Jerzy Łuczka

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-08

Description: Author(s): Marcin Łobejko, Jerzy Dajka, and Jerzy Łuczka The stochastic dynamics of a quantum system driven by N statistically independent random sudden quenches in a fixed time interval is studied. We reveal that with increasing N the system approaches a deterministic limit, indicating self-averaging with respect to its temporal unitary evolution. This p... [Phys. Rev. A 98, 022111] Published Tue Aug 07, 2018

Keywords: Fundamental concepts

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Diffusion of quantum vortices (2018)

E. Rickinson, N. G. Parker, A. W. Baggaley, and C. F. Barenghi

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-08

Description: Author(s): E. Rickinson, N. G. Parker, A. W. Baggaley, and C. F. Barenghi We determine the evolution of a cluster of quantum vortices initially placed at the center of a larger vortex-free region. We find that the cluster spreads out spatially. This spreading motion consists of two effects: the rapid evaporation of vortex dipoles from the cluster and the slow expansion of... [Phys. Rev. A 98, 023608] Published Tue Aug 07, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Shedding light on topological superconductors (2018)

K. H. A. Villegas, V. M. Kovalev, F. V. Kusmartsev, and I. G. Savenko

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-08-08

Description: Author(s): K. H. A. Villegas, V. M. Kovalev, F. V. Kusmartsev, and I. G. Savenko We propose an effective optical approach to monitor superconductors in a two-layer superconductor-normal metal structure. Effectively, such a hybrid system represents a resonator, where electrons are strongly coupled with light. We show that the interaction of light with the superconductor is strong... [Phys. Rev. B 98, 064502] Published Tue Aug 07, 2018

Keywords: Superfluidity and superconductivity

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Nematicity and Charge Order in Superoxygenated ${\mathrm{La}}_{2−x}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4+y}$ (2018)

Zhiwei Zhang, R. Sutarto, F. He, F. C. Chou, L. Udby, S. L. Holm, Z. H. Zhu, W. A. Hines, J. I. Budnick, and B. O. Wells

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-09

Description: Author(s): Zhiwei Zhang, R. Sutarto, F. He, F. C. Chou, L. Udby, S. L. Holm, Z. H. Zhu, W. A. Hines, J. I. Budnick, and B. O. Wells In this Letter, we report a resonant x-ray scattering measurement of stripelike charge order in the 1/8th doped component of electronically phase-separated, orthorhombic La 2 CuO 4 + y . This observation is coupled to the absence of any resonant (001) peak, which at different resonant energies has been id... [Phys. Rev. Lett. 121, 067602] Published Wed Aug 08, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Electrical Reservoirs for Bilayer Excitons (2018)

Ming Xie and A. H. Mac; Donald

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-09

Description: Author(s): Ming Xie and A. H. MacDonald The ground state of two-dimensional (2D) electron systems with equal low densities of electrons and holes in nearby layers is an exciton fluid. We show that a reservoir for excitons can be established by contacting the two layers separately and maintaining the chemical potential difference at a valu... [Phys. Rev. Lett. 121, 067702] Published Wed Aug 08, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Correlation-Driven Dimerization and Topological Gap Opening in Isotropically Strained Graphene (2018)

Sandro Sorella, Kazuhiro Seki, Oleg O. Brovko, Tomonori Shirakawa, Shohei Miyakoshi, Seiji Yunoki, and Erio Tosatti

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-09

Description: Author(s): Sandro Sorella, Kazuhiro Seki, Oleg O. Brovko, Tomonori Shirakawa, Shohei Miyakoshi, Seiji Yunoki, and Erio Tosatti The phase diagram of isotropically expanded graphene cannot be correctly predicted by ignoring either electron correlations, or mobile carbons, or the effect of applied stress, as was done so far. We calculate the ground state enthalpy (not just energy) of strained graphene by an accurate off-lattic... [Phys. Rev. Lett. 121, 066402] Published Wed Aug 08, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Spin Waves in Detwinned ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{2}$ (2018)

Xingye Lu, Daniel D. Scherer, David W. Tam, Wenliang Zhang, Rui Zhang, Huiqian Luo, Leland W. Harriger, H. C. Walker, D. T. Adroja, Brian M. Andersen, and Pengcheng Dai

American Physical Society (APS)

In: Physical Review Letters

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Publication Date: 2018-08-09

Description: Author(s): Xingye Lu, Daniel D. Scherer, David W. Tam, Wenliang Zhang, Rui Zhang, Huiqian Luo, Leland W. Harriger, H. C. Walker, D. T. Adroja, Brian M. Andersen, and Pengcheng Dai Understanding magnetic interactions in the parent compounds of high-temperature superconductors forms the basis for determining their role for the mechanism of superconductivity. For parent compounds of iron pnictide superconductors such as A Fe 2 As 2 ( A = Ba , Ca, Sr), although spin excitations have been... [Phys. Rev. Lett. 121, 067002] Published Wed Aug 08, 2018

Keywords: Condensed Matter: Electronic Properties, etc.

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Vortex patterns and the critical rotational frequency in rotating dipolar Bose-Einstein condensates (2018)

Yongyong Cai, Yongjun Yuan, Matthias Rosenkranz, Han Pu, and Weizhu Bao

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-11

Description: Author(s): Yongyong Cai, Yongjun Yuan, Matthias Rosenkranz, Han Pu, and Weizhu Bao Based on the two-dimensional mean-field equations for pancake-shaped dipolar Bose-Einstein condensates in a rotating frame, for both attractive and repulsive dipole-dipole interaction (DDI) as well as arbitrary polarization direction, we study the profiles of the single vortex state and show how the... [Phys. Rev. A 98, 023610] Published Fri Aug 10, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Classical analog of the Unruh effect (2018)

Ulf Leonhardt, Itay Griniasty, Sander Wildeman, Emmanuel Fort, and Mathias Fink

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-08-14

Description: Author(s): Ulf Leonhardt, Itay Griniasty, Sander Wildeman, Emmanuel Fort, and Mathias Fink In the Unruh effect an observer with constant acceleration perceives the quantum vacuum as thermal radiation. The Unruh effect has been believed to be a pure quantum phenomenon, but here we show theoretically how the effect arises from the correlation of noise, regardless of whether this noise is qu... [Phys. Rev. A 98, 022118] Published Mon Aug 13, 2018

Keywords: Fundamental concepts

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