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1

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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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Publikationsdatum: 2018-03-13

Beschreibung: 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

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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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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Publikationsdatum: 2018-07-26

Beschreibung: 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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Publikationsdatum: 2018-07-27

Beschreibung: 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

Schlagwort(e): Fundamental concepts

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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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Publikationsdatum: 2018-07-27

Beschreibung: 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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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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Publikationsdatum: 2018-07-31

Beschreibung: 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

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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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Publikationsdatum: 2018-07-25

Beschreibung: 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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Publikationsdatum: 2018-08-02

Beschreibung: 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

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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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Publikationsdatum: 2018-08-04

Beschreibung: 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

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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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Publikationsdatum: 2018-08-04

Beschreibung: 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

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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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Publikationsdatum: 2018-08-04

Beschreibung: 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

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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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Publikationsdatum: 2018-08-07

Beschreibung: 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

Schlagwort(e): Fundamental concepts

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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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Publikationsdatum: 2018-08-07

Beschreibung: 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

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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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Publikationsdatum: 2018-08-08

Beschreibung: 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

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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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Publikationsdatum: 2018-08-08

Beschreibung: 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

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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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Publikationsdatum: 2018-06-12

Beschreibung: 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

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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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Publikationsdatum: 2018-06-06

Beschreibung: 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

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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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Publikationsdatum: 2018-06-15

Beschreibung: 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

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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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Publikationsdatum: 2018-06-06

Beschreibung: 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

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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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Publikationsdatum: 2018-06-16

Beschreibung: 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

Schlagwort(e): 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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Publikationsdatum: 2018-06-16

Beschreibung: 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

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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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Publikationsdatum: 2018-06-16

Beschreibung: 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

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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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Publikationsdatum: 2018-06-16

Beschreibung: 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

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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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Publikationsdatum: 2018-06-19

Beschreibung: 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

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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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Publikationsdatum: 2018-06-19

Beschreibung: 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

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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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Publikationsdatum: 2018-06-28

Beschreibung: 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

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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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Publikationsdatum: 2018-06-28

Beschreibung: 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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Publikationsdatum: 2018-06-29

Beschreibung: 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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Publikationsdatum: 2018-11-27

Beschreibung: 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

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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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Publikationsdatum: 2018-11-27

Beschreibung: 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

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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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Publikationsdatum: 2018-11-27

Beschreibung: 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

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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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Publikationsdatum: 2018-11-29

Beschreibung: 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

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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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Publikationsdatum: 2018-11-28

Beschreibung: 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

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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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Publikationsdatum: 2018-11-30

Beschreibung: 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

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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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Publikationsdatum: 2018-12-01

Beschreibung: 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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Publikationsdatum: 2018-12-04

Beschreibung: 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

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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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Publikationsdatum: 2018-12-04

Beschreibung: 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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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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Publikationsdatum: 2018-12-08

Beschreibung: 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

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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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Publikationsdatum: 2018-12-13

Beschreibung: 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

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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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Publikationsdatum: 2018-12-14

Beschreibung: 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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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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Publikationsdatum: 2018-12-14

Beschreibung: 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

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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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Publikationsdatum: 2018-12-15

Beschreibung: 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

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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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Publikationsdatum: 2018-07-26

Beschreibung: 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

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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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Publikationsdatum: 2018-07-26

Beschreibung: 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

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Lorentz-boost eigenmodes (2018)

Konstantin Y. Bliokh

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-07-31

Beschreibung: 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

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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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Publikationsdatum: 2018-08-02

Beschreibung: 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

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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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Publikationsdatum: 2018-08-02

Beschreibung: 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

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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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Publikationsdatum: 2018-08-08

Beschreibung: 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

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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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Publikationsdatum: 2018-08-09

Beschreibung: 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

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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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Publikationsdatum: 2018-08-09

Beschreibung: 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

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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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Publikationsdatum: 2018-08-09

Beschreibung: 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

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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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Publikationsdatum: 2018-08-09

Beschreibung: 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

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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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Publikationsdatum: 2018-08-14

Beschreibung: 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

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Central Charge of Periodically Driven Critical Kitaev Chains (2018)

Daniel Yates, Yonah Lemonik, and Aditi Mitra

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): Daniel Yates, Yonah Lemonik, and Aditi Mitra Periodically driven Kitaev chains show a rich phase diagram as the amplitude and frequency of the drive is varied, with topological phase transitions separating regions with different number of Majorana zero and π modes. We explore whether the critical point separating different phases of the period... [Phys. Rev. Lett. 121, 076802] Published Tue Aug 14, 2018

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Spin Lifetime and Charge Noise in Hot Silicon Quantum Dot Qubits (2018)

L. Petit, J. M. Boter, H. G. J. Eenink, G. Droulers, M. L. V. Tagliaferri, R. Li, D. P. Franke, K. J. Singh, J. S. Clarke, R. N. Schouten, V. V. Dobrovitski, L. M. K. Vandersypen, and M. Veldhorst

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): L. Petit, J. M. Boter, H. G. J. Eenink, G. Droulers, M. L. V. Tagliaferri, R. Li, D. P. Franke, K. J. Singh, J. S. Clarke, R. N. Schouten, V. V. Dobrovitski, L. M. K. Vandersypen, and M. Veldhorst We investigate the magnetic field and temperature dependence of the single-electron spin lifetime in silicon quantum dots and find a lifetime of 2.8 ms at a temperature of 1.1 K. We develop a model based on spin-valley mixing and find that Johnson noise and two-phonon processes limit relaxation at l... [Phys. Rev. Lett. 121, 076801] Published Tue Aug 14, 2018

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Temperature Controlled Fulde-Ferrell-Larkin-Ovchinnikov Instability in Superconductor-Ferromagnet Hybrids (2018)

S. V. Mironov, D. Yu. Vodolazov, Y. Yerin, A. V. Samokhvalov, A. S. Mel’nikov, and A. Buzdin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): S. V. Mironov, D. Yu. Vodolazov, Y. Yerin, A. V. Samokhvalov, A. S. Mel’nikov, and A. Buzdin We show that a wide class of layered superconductor-ferromagnet ( S / F ) hybrids demonstrates the emergence of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase well below the superconducting transition temperature. By decreasing the temperature, one can switch the system from uniform to the FFLO state... [Phys. Rev. Lett. 121, 077002] Published Wed Aug 15, 2018

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From Kinetic Instability to Bose-Einstein Condensation and Magnon Supercurrents (2018)

Alexander J. E. Kreil, Dmytro A. Bozhko, Halyna Yu. Musiienko-Shmarova, Vitaliy I. Vasyuchka, Victor S. L’vov, Anna Pomyalov, Burkard Hillebrands, and Alexander A. Serga

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): Alexander J. E. Kreil, Dmytro A. Bozhko, Halyna Yu. Musiienko-Shmarova, Vitaliy I. Vasyuchka, Victor S. L’vov, Anna Pomyalov, Burkard Hillebrands, and Alexander A. Serga Evolution of an overpopulated gas of magnons to a Bose-Einstein condensate and excitation of a magnon supercurrent, propelled by a phase gradient in the condensate wave function, can be observed at room temperature by means of the Brillouin light scattering spectroscopy in an yttrium iron garnet mat... [Phys. Rev. Lett. 121, 077203] Published Wed Aug 15, 2018

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Time deformations of master equations (2018)

Sergey N. Filippov and Dariusz Chruściński

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): Sergey N. Filippov and Dariusz Chruściński Convolutionless and convolution master equations are the two mostly used physical descriptions of open quantum systems dynamics. We subject these equations to time deformations: local dilations and contractions of time scale. We prove that the convolutionless equation remains legitimate under any ti... [Phys. Rev. A 98, 022123] Published Fri Aug 17, 2018

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Influence of Spin-Orbit Coupling in Iron-Based Superconductors (2018)

R. P. Day, G. Levy, M. Michiardi, B. Zwartsenberg, M. Zonno, F. Ji, E. Razzoli, F. Boschini, S. Chi, R. Liang, P. K. Das, I. Vobornik, J. Fujii, W. N. Hardy, D. A. Bonn, I. S. Elfimov, and A. Damascelli

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): R. P. Day, G. Levy, M. Michiardi, B. Zwartsenberg, M. Zonno, F. Ji, E. Razzoli, F. Boschini, S. Chi, R. Liang, P. K. Das, I. Vobornik, J. Fujii, W. N. Hardy, D. A. Bonn, I. S. Elfimov, and A. Damascelli We report on the influence of spin-orbit coupling (SOC) in Fe-based superconductors via application of circularly polarized spin and angle-resolved photoemission spectroscopy. We combine this technique in representative members of both the Fe-pnictides (LiFeAs) and Fe-chalcogenides (FeSe) with tight... [Phys. Rev. Lett. 121, 076401] Published Fri Aug 17, 2018

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Three-Dimensional Fermi Surface of Overdoped La-Based Cuprates (2018)

M. Horio et al.

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): M. Horio et al. We present a soft x-ray angle-resolved photoemission spectroscopy study of overdoped high-temperature superconductors. In-plane and out-of-plane components of the Fermi surface are mapped by varying the photoemission angle and the incident photon energy. No k z dispersion is observed along the nodal ... [Phys. Rev. Lett. 121, 077004] Published Fri Aug 17, 2018

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Single-Site Non-Fermi-Liquid Behaviors in a Diluted $4{f}^{2}$ System ${\mathrm{Y}}_{1−x}{\mathrm{Pr}}_{x}{\mathrm{Ir}}_{2}{\mathrm{Zn}}_{20}$ (2018)

Y. Yamane, T. Onimaru, K. Wakiya, K. T. Matsumoto, K. Umeo, and T. Takabatake

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): Y. Yamane, T. Onimaru, K. Wakiya, K. T. Matsumoto, K. Umeo, and T. Takabatake Electrical resistivity ρ ( T ) and specific heat C ( T ) measurements have been made on the diluted 4 f 2 system Y ( Pr ) Ir 2 Zn 20 . Both data of ρ and magnetic specific heat C m per Pr ion are well scaled as a function of T / T 0 , where T 0 is a characteristic temperature of non-Fermi-liquid (NFL) behaviors. Furtherm... [Phys. Rev. Lett. 121, 077206] Published Fri Aug 17, 2018

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Magnetic Exchange Fields and Domain Wall Superconductivity at an All-Oxide Superconductor-Ferromagnet Insulator Interface (2018)

S. Komori, A. Di Bernardo, A. I. Buzdin, M. G. Blamire, and J. W. A. Robinson

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): S. Komori, A. Di Bernardo, A. I. Buzdin, M. G. Blamire, and J. W. A. Robinson At a superconductor-ferromagnet ( S / F ) interface, the F layer can introduce a magnetic exchange field within the S layer, which acts to locally spin split the superconducting density of states. The effect of magnetic exchange fields on superconductivity has been thoroughly explored at S -ferromagnet i... [Phys. Rev. Lett. 121, 077003] Published Fri Aug 17, 2018

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System information propagation for composite structures (2018)

P. Mironowicz, P. Należyty, P. Horodecki, and J. K. Korbicz

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-21

Beschreibung: Author(s): P. Mironowicz, P. Należyty, P. Horodecki, and J. K. Korbicz We study in detail the decoherence process of a quantum register, coupled to a composite environment. We use recently developed methods of information transfer study in open quantum systems to analyze information flow between the register and its environment. We show that there are regimes when not ... [Phys. Rev. A 98, 022124] Published Mon Aug 20, 2018

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Scattering due to geometry: Case of a spinless particle moving on an asymptotically flat embedded surface (2018)

Neslihan Oflaz, Ali Mostafazadeh, and Mehrdad Ahmady

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-21

Beschreibung: Author(s): Neslihan Oflaz, Ali Mostafazadeh, and Mehrdad Ahmady A nonrelativistic quantum mechanical particle moving freely on a curved surface feels the effect of the nontrivial geometry of the surface through the kinetic part of the Hamiltonian, which is proportional to the Laplace-Beltrami operator, and a geometric potential, which is a linear combination of ... [Phys. Rev. A 98, 022126] Published Mon Aug 20, 2018

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Simple harmonic oscillation in a non-Hermitian Su-Schrieffer-Heeger chain at the exceptional point (2018)

K. L. Zhang, P. Wang, G. Zhang, and Z. Song

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-22

Beschreibung: Author(s): K. L. Zhang, P. Wang, G. Zhang, and Z. Song The balance of gain and loss in an open system may maintain certain Hermitian dynamical behaviors which can be hardly observed in a popular Hermitian system. In this paper, we systematically study a 1D PT -symmetry non-Hermitian Su-Schrieffer-Heeger model with open boundary condition based on an exac... [Phys. Rev. A 98, 022128] Published Tue Aug 21, 2018

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Resonant-state expansion applied to one-dimensional quantum systems (2018)

A. Tanimu and E. A. Muljarov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-22

Beschreibung: Author(s): A. Tanimu and E. A. Muljarov The resonant-state expansion, a rigorous perturbation theory recently developed in electrodynamics, is applied to nonrelativistic quantum-mechanical systems in one dimension. The method is used here for finding the resonant states in various potentials approximated by combinations of Dirac δ functio... [Phys. Rev. A 98, 022127] Published Tue Aug 21, 2018

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Dynamical quantum phase transitions in non-Hermitian lattices (2018)

Longwen Zhou, Qing-hai Wang, Hailong Wang, and Jiangbin Gong

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-22

Beschreibung: Author(s): Longwen Zhou, Qing-hai Wang, Hailong Wang, and Jiangbin Gong In closed quantum systems, dynamical phase transitions are identified by the nonanalytic behavior of the return probability as a function of time. In this work, we study the nonunitary dynamics following quenches across exceptional points in a non-Hermitian lattice realizable by optical resonators. ... [Phys. Rev. A 98, 022129] Published Tue Aug 21, 2018

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Fractionalized Metal in a Falicov-Kimball Model (2018)

Martin Hohenadler and Fakher F. Assaad

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-22

Beschreibung: Author(s): Martin Hohenadler and Fakher F. Assaad Quantum Monte Carlo simulations reveal an exotic metallic phase with a single-particle gap but gapless spin and charge excitations and a nonsaturating resistivity in a two-dimensional SU(2) Falicov-Kimball model. An exact duality between this model and an unconstrained slave-spin theory leads to a c... [Phys. Rev. Lett. 121, 086601] Published Tue Aug 21, 2018

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Inter-Landau-level Andreev Reflection at the Dirac Point in a Graphene Quantum Hall State Coupled to a ${\mathrm{NbSe}}_{2}$ Superconductor (2018)

Manas Ranjan Sahu, Xin Liu, Arup Kumar Paul, Sourin Das, Pratap Raychaudhuri, J. K. Jain, and Anindya Das

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Manas Ranjan Sahu, Xin Liu, Arup Kumar Paul, Sourin Das, Pratap Raychaudhuri, J. K. Jain, and Anindya Das Superconductivity and the quantum Hall effect are distinct states of matter occurring in apparently incompatible physical conditions. Recent theoretical developments suggest that the coupling of the quantum Hall effect with a superconductor can provide fertile ground for realizing exotic topological... [Phys. Rev. Lett. 121, 086809] Published Fri Aug 24, 2018

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Fast Detection of a Weak Signal by a Stochastic Resonance Induced by a Coherence Resonance in an Excitable $\mathrm{GaAs}/{\mathrm{Al}}_{0.45}{\mathrm{Ga}}_{0.55}\mathrm{As}$ Superlattice (2018)

Zhengzheng Shao, Zhizhen Yin, Helun Song, Wei Liu, Xiujian Li, Jubo Zhu, Klaus Biermann, Luis L. Bonilla, Holger T. Grahn, and Yaohui Zhang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Zhengzheng Shao, Zhizhen Yin, Helun Song, Wei Liu, Xiujian Li, Jubo Zhu, Klaus Biermann, Luis L. Bonilla, Holger T. Grahn, and Yaohui Zhang The effect of a coherence resonance is observed experimentally in a GaAs / Al 0.45 Ga 0.55 As superlattice under dc bias at room temperature, which is driven by noise. For an applied voltage, for which no current self-oscillations are observed, regular current self-oscillations with a frequency of about 8... [Phys. Rev. Lett. 121, 086806] Published Fri Aug 24, 2018

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Symmetry-Protected Topological Metals (2018)

Xuzhe Ying and Alex Kamenev

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Xuzhe Ying and Alex Kamenev We show that sharply defined topological quantum phase transitions are not limited to states of matter with gapped electronic spectra. Such transitions may also occur between two gapless metallic states both with extended Fermi surfaces. The transition is characterized by a discontinuous, but not qu... [Phys. Rev. Lett. 121, 086810] Published Fri Aug 24, 2018

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Measurement of the Entanglement Spectrum of a Symmetry-Protected Topological State Using the IBM Quantum Computer (2018)

Kenny Choo, Curt W. von Keyserlingk, Nicolas Regnault, and Titus Neupert

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Kenny Choo, Curt W. von Keyserlingk, Nicolas Regnault, and Titus Neupert Entanglement properties are routinely used to characterize phases of quantum matter in theoretical computations. For example, the spectrum of the reduced density matrix, or so-called “entanglement spectrum”, has become a widely used diagnostic for universal topological properties of quantum phases. ... [Phys. Rev. Lett. 121, 086808] Published Fri Aug 24, 2018

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Coherence Resonance and Stochastic Resonance in an Excitable Semiconductor Superlattice (2018)

Emanuel Mompo, Miguel Ruiz-Garcia, Manuel Carretero, Holger T. Grahn, Yaohui Zhang, and Luis L. Bonilla

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-25

Beschreibung: Author(s): Emanuel Mompo, Miguel Ruiz-Garcia, Manuel Carretero, Holger T. Grahn, Yaohui Zhang, and Luis L. Bonilla Collective electron transport causes a weakly coupled semiconductor superlattice under dc voltage bias to be an excitable system with 2 N + 2 degrees of freedom: electron densities and fields at N superlattice periods plus the total current and the field at the injector. External noise of sufficient am... [Phys. Rev. Lett. 121, 086805] Published Fri Aug 24, 2018

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Approach to coherent interference fringes in helium-surface scattering (2018)

Matthew C. Schram and Eric J. Heller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-29

Beschreibung: Author(s): Matthew C. Schram and Eric J. Heller The conventional notion of elastic, coherent atom-surface scattering originates from the scattering particles acting as a quantum-mechanical matter wave, which coherently interfere to produce distinct Bragg peaks which persist at finite temperature. If we introduce inelastic scattering to this scena... [Phys. Rev. A 98, 022137] Published Tue Aug 28, 2018

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Monopole-Induced Emergent Electric Fields in Ferromagnetic Nanowires (2018)

Michalis Charilaou, Hans-Benjamin Braun, and Jörg F. Löffler

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-29

Beschreibung: Author(s): Michalis Charilaou, Hans-Benjamin Braun, and Jörg F. Löffler We predict that complete magnetization reversal in simple metallic ferromagnetic nanoparticles is directly linked to the pair creation of topological point defects in the form of hedgehog-antihedgehog pairs. These dynamical point defects move at exceptionally high speeds in excess of 1500 m / s , fast... [Phys. Rev. Lett. 121, 097202] Published Tue Aug 28, 2018

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Thermally Driven Out-of-Equilibrium Two-Impurity Kondo System (2018)

Miguel A. Sierra, Rosa López, and Jong Soo Lim

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-30

Beschreibung: Author(s): Miguel A. Sierra, Rosa López, and Jong Soo Lim The archetypal two-impurity Kondo problem in a serially coupled double quantum dot is investigated in the presence of a thermal bias θ . The slave-boson formulation is employed to obtain the nonlinear thermal and thermoelectrical responses. When the Kondo correlations prevail over the antiferromagnet... [Phys. Rev. Lett. 121, 096801] Published Wed Aug 29, 2018

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Coherence orders, decoherence, and quantum metrology (2018)

Diego P. Pires, Isabela A. Silva, Eduardo R. de; Azevedo, Diogo O. Soares-Pinto, and Jefferson G. Filgueiras

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Diego P. Pires, Isabela A. Silva, Eduardo R. deAzevedo, Diogo O. Soares-Pinto, and Jefferson G. Filgueiras Since the dawn of quantum theory, coherence has been attributed as a key to understand the weirdness of fundamental concepts such as, e.g., the wave-particle duality and the Stern-Gerlach experiment. Recently, based on a resource theory approach, the notion of quantum coherence was revisited and a p... [Phys. Rev. A 98, 032101] Published Tue Sep 04, 2018

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Method for the construction of the Lewis-Riesenfeld time-dependent invariants and their eigenvalue equations (2018)

M. A. de Ponte, P. M. Cônsoli, and M. H. Y. Moussa

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): M. A. de Ponte, P. M. Cônsoli, and M. H. Y. Moussa We propose here a method for the construction of the Lewis and Riesenfeld time-dependent invariants. Instead of directly invoking the equation that defines the invariant associated with a time-dependent Hamiltonian, our method allows the step-by-step construction of the invariant as a product of ope... [Phys. Rev. A 98, 032102] Published Tue Sep 04, 2018

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Objectivity (or lack thereof): Comparison between predictions of quantum Darwinism and spectrum broadcast structure (2018)

Thao P. Le and Alexandra Olaya-Castro

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-06

Beschreibung: Author(s): Thao P. Le and Alexandra Olaya-Castro Quantum Darwinism and spectrum broadcast structure describe the emergence of objectivity in quantum systems. However, it is unclear whether these two frameworks lead to consistent predictions on the objectivity of the state of a quantum system in a given scenario. In this paper, we jointly investiga... [Phys. Rev. A 98, 032103] Published Wed Sep 05, 2018

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Quantum walks over a square lattice (2018)

Arkaprabha Ghosal and Prasenjit Deb

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): Arkaprabha Ghosal and Prasenjit Deb Quantum random walk finds application in efficient quantum algorithms as well as in quantum network theory. Here we study the mixing time of a discrete quantum walk over a square lattice in the presence of dynamic percolation and decoherence. We consider bit-flip and phase damping noise, and evaluat... [Phys. Rev. A 98, 032104] Published Thu Sep 06, 2018

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Imaging the Zigzag Wigner Crystal in Confinement-Tunable Quantum Wires (2018)

Sheng-Chin Ho, Heng-Jian Chang, Chia-Hua Chang, Shun-Tsung Lo, Graham Creeth, Sanjeev Kumar, Ian Farrer, David Ritchie, Jonathan Griffiths, Geraint Jones, Michael Pepper, and Tse-Ming Chen

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): Sheng-Chin Ho, Heng-Jian Chang, Chia-Hua Chang, Shun-Tsung Lo, Graham Creeth, Sanjeev Kumar, Ian Farrer, David Ritchie, Jonathan Griffiths, Geraint Jones, Michael Pepper, and Tse-Ming Chen Using a nanowire with controllable width, researchers have created a type of Wigner crystal in which electrons form an ordered zigzag pattern. [Phys. Rev. Lett. 121, 106801] Published Thu Sep 06, 2018

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Noise-Induced Backscattering in a Quantum Spin Hall Edge (2018)

Jukka I. Väyrynen, Dmitry I. Pikulin, and Jason Alicea

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): Jukka I. Väyrynen, Dmitry I. Pikulin, and Jason Alicea The observed imperfect conductance quantization in 2D topological insulators may be due to time-dependent electronic noise from charge puddles. [Phys. Rev. Lett. 121, 106601] Published Thu Sep 06, 2018

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Spontaneous Exact Spin-Wave Fractals in Magnonic Crystals (2018)

Daniel Richardson, Boris A. Kalinikos, Lincoln D. Carr, and Mingzhong Wu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-08

Beschreibung: Author(s): Daniel Richardson, Boris A. Kalinikos, Lincoln D. Carr, and Mingzhong Wu Exact fractals of nonlinear waves that rely on strong dispersion and nonlinearity and arise spontaneously out of magnetic media were observed for the first time. The experiments make use of a microwave to excite a spin wave in a quasi-one-dimensional magnonic crystal. When the power of the input mic... [Phys. Rev. Lett. 121, 107204] Published Fri Sep 07, 2018

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Quantum uncertainty relation based on the mean deviation (2018)

Gautam Sharma, Chiranjib Mukhopadhyay, Sk Sazim, and Arun Kumar Pati

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-12

Beschreibung: Author(s): Gautam Sharma, Chiranjib Mukhopadhyay, Sk Sazim, and Arun Kumar Pati Traditional forms of quantum uncertainty relations are invariably based on the standard deviation. This can be understood in the historical context of simultaneous development of quantum theory and mathematical statistics. Here we present alternative forms of uncertainty relations, in both state-dep... [Phys. Rev. A 98, 032106] Published Tue Sep 11, 2018

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Optimal quantum preparation contextuality in an $n$-bit parity-oblivious multiplexing task (2018)

Shouvik Ghorai and A. K. Pan

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-15

Beschreibung: Author(s): Shouvik Ghorai and A. K. Pan In [ Phys. Rev. Lett. 102 , 010401 (2009) ], Spekkens et al. have shown that quantum preparation contextuality can power the parity-oblivious multiplexing (POM) task. The bound on the optimal success probability of an n -bit POM task performed with the classical resources was shown to be the same as in ... [Phys. Rev. A 98, 032110] Published Fri Sep 14, 2018

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Binary Two-Dimensional Honeycomb Lattice with Strong Spin-Orbit Coupling and Electron-Hole Asymmetry (2018)

Jian Gou, Bingyu Xia, Hang Li, Xuguang Wang, Longjuan Kong, Peng Cheng, Hui Li, Weifeng Zhang, Tian Qian, Hong Ding, Yong Xu, Wenhui Duan, Kehui Wu, and Lan Chen

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-18

Beschreibung: Author(s): Jian Gou, Bingyu Xia, Hang Li, Xuguang Wang, Longjuan Kong, Peng Cheng, Hui Li, Weifeng Zhang, Tian Qian, Hong Ding, Yong Xu, Wenhui Duan, Kehui Wu, and Lan Chen A honeycomb structure of Bi and Sn atoms on a Si substrate has a pronounced electron-hole asymmetry, providing a platform to explore applications in nanodevices. [Phys. Rev. Lett. 121, 126801] Published Mon Sep 17, 2018

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Thermal Critical Points and Quantum Critical End Point in the Frustrated Bilayer Heisenberg Antiferromagnet (2018)

J. Stapmanns, P. Corboz, F. Mila, A. Honecker, B. Normand, and S. Wessel

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-18

Beschreibung: Author(s): J. Stapmanns, P. Corboz, F. Mila, A. Honecker, B. Normand, and S. Wessel We consider the finite-temperature phase diagram of the S = 1 / 2 frustrated Heisenberg bilayer. Although this two-dimensional system may show magnetic order only at zero temperature, we demonstrate the presence of a line of finite-temperature critical points related to the line of first-order transitio... [Phys. Rev. Lett. 121, 127201] Published Mon Sep 17, 2018

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Strong and Tunable Spin-Lifetime Anisotropy in Dual-Gated Bilayer Graphene (2018)

Jinsong Xu, Tiancong Zhu, Yunqiu Kelly Luo, Yuan-Ming Lu, and Roland K. Kawakami

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Jinsong Xu, Tiancong Zhu, Yunqiu Kelly Luo, Yuan-Ming Lu, and Roland K. Kawakami Two groups have shown they can create long-lived, polarized spin currents in bilayer graphene. [Phys. Rev. Lett. 121, 127703] Published Thu Sep 20, 2018

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Mirage Andreev Spectra Generated by Mesoscopic Leads in Nanowire Quantum Dots (2018)

Z. Su, A. Zarassi, J.-F. Hsu, P. San-Jose, E. Prada, R. Aguado, E. J. H. Lee, S. Gazibegovic, R. L. M. Op het Veld, D. Car, S. R. Plissard, M. Hocevar, M. Pendharkar, J. S. Lee, J. A. Logan, C. J. Palmstrøm, E. P. A. M. Bakkers, and S. M. Frolov

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Z. Su, A. Zarassi, J.-F. Hsu, P. San-Jose, E. Prada, R. Aguado, E. J. H. Lee, S. Gazibegovic, R. L. M. Op het Veld, D. Car, S. R. Plissard, M. Hocevar, M. Pendharkar, J. S. Lee, J. A. Logan, C. J. Palmstrøm, E. P. A. M. Bakkers, and S. M. Frolov We study transport mediated by Andreev bound states formed in InSb nanowire quantum dots. Two kinds of superconducting source and drain contacts are used: epitaxial Al/InSb devices exhibit a doubling of tunneling resonances, while, in NbTiN / InSb devices, Andreev spectra of the dot appear to be repli... [Phys. Rev. Lett. 121, 127705] Published Thu Sep 20, 2018

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Observation of Spin-Valley-Coupling-Induced Large Spin-Lifetime Anisotropy in Bilayer Graphene (2018)

Johannes Christian Leutenantsmeyer, Josep Ingla-Aynés, Jaroslav Fabian, and Bart J. van Wees

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Johannes Christian Leutenantsmeyer, Josep Ingla-Aynés, Jaroslav Fabian, and Bart J. van Wees Two groups have shown they can create long-lived, polarized spin currents in bilayer graphene. [Phys. Rev. Lett. 121, 127702] Published Thu Sep 20, 2018

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Interaction-Driven Giant Orbital Magnetic Moments in Carbon Nanotubes (2018)

Joshua O. Island, Marvin Ostermann, Lee Aspitarte, Ethan D. Minot, Daniele Varsano, Elisa Molinari, Massimo Rontani, and Gary A. Steele

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-21

Beschreibung: Author(s): Joshua O. Island, Marvin Ostermann, Lee Aspitarte, Ethan D. Minot, Daniele Varsano, Elisa Molinari, Massimo Rontani, and Gary A. Steele Carbon nanotubes continue to be model systems for studies of confinement and interactions. This is particularly true in the case of so-called “ultraclean” carbon nanotube devices offering the study of quantum dots with extremely low disorder. The quality of such systems, however, has increasingly re... [Phys. Rev. Lett. 121, 127704] Published Thu Sep 20, 2018

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Quantum theories from principles without assuming a definite causal structure (2018)

Ding Jia (贾丁)

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-20

Beschreibung: Author(s): Ding Jia (贾丁) There has been a body of work deriving the complex Hilbert-space structure of quantum theory from axioms/principles/postulates to deepen our understanding of quantum theory and to reveal ways to go beyond it to resolve foundational issues. Recent progress in incorporating indefinite causal structure... [Phys. Rev. A 98, 032112] Published Wed Sep 19, 2018

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Stochastic decoupling approach to the spin-boson dynamics: Perturbative and nonperturbative treatments (2018)

Wei Wu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-09-22

Beschreibung: Author(s): Wei Wu We develop a hierarchical functional derivative (HFD) method to investigate the reduced dynamics of a spin-boson model within the framework of a stochastic decoupling description. Keeping only the lowest-order truncation of the hierarchical functional derivatives, one can recover the second-order Na... [Phys. Rev. A 98, 032116] Published Fri Sep 21, 2018

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Tuning Anti-Klein to Klein Tunneling in Bilayer Graphene (2018)

Renjun Du (杜人君), Ming-Hao Liu (劉明豪), Jens Mohrmann, Fan Wu (吴凡), Ralph Krupke, Hilbert von Löhneysen, Klaus Richter, and Romain Danneau

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-22

Beschreibung: Author(s): Renjun Du (杜人君), Ming-Hao Liu (劉明豪), Jens Mohrmann, Fan Wu (吴凡), Ralph Krupke, Hilbert von Löhneysen, Klaus Richter, and Romain Danneau We show that in gapped bilayer graphene, quasiparticle tunneling and the corresponding Berry phase can be controlled such that they exhibit features of single-layer graphene such as Klein tunneling. The Berry phase is detected by a high-quality Fabry-Pérot interferometer based on bilayer graphene. B... [Phys. Rev. Lett. 121, 127706] Published Fri Sep 21, 2018

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Non-Hermitian Chern Bands (2018)

Shunyu Yao, Fei Song, and Zhong Wang

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-25

Beschreibung: Author(s): Shunyu Yao, Fei Song, and Zhong Wang The relation between chiral edge modes and bulk Chern numbers of quantum Hall insulators is a paradigmatic example of bulk-boundary correspondence. We show that the chiral edge modes are not strictly tied to the Chern numbers defined by a non-Hermitian Bloch Hamiltonian. This breakdown of convention... [Phys. Rev. Lett. 121, 136802] Published Mon Sep 24, 2018

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Néel- and Bloch-Type Magnetic Vortices in Rashba Metals (2018)

Satoru Hayami and Yukitoshi Motome

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): Satoru Hayami and Yukitoshi Motome We theoretically study noncoplanar spin textures in polar magnetic conductors. Starting from the Kondo lattice model with the Rashba spin-orbit coupling, we derive an effective spin model with generalized Ruderman-Kittel-Kasuya-Yosida interactions including the anisotropic and antisymmetric exchange... [Phys. Rev. Lett. 121, 137202] Published Tue Sep 25, 2018

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Digitale ISSN: 1079-7114

Thema: Physik

Publiziert von American Physical Society (APS)

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Evidence of a Coulomb-Interaction-Induced Lifshitz Transition and Robust Hybrid Weyl Semimetal in ${T}_{d}\text{−}{\mathrm{MoTe}}_{2}$ (2018)

N. Xu, Z. W. Wang, A. Magrez, P. Bugnon, H. Berger, C. E. Matt, V. N. Strocov, N. C. Plumb, M. Radovic, E. Pomjakushina, K. Conder, J. H. Dil, J. Mesot, R. Yu, H. Ding, and M. Shi

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): N. Xu, Z. W. Wang, A. Magrez, P. Bugnon, H. Berger, C. E. Matt, V. N. Strocov, N. C. Plumb, M. Radovic, E. Pomjakushina, K. Conder, J. H. Dil, J. Mesot, R. Yu, H. Ding, and M. Shi Using soft x-ray angle-resolved photoemission spectroscopy we probed the bulk electronic structure of T d − MoTe 2 . We found that on-site Coulomb interaction leads to a Lifshitz transition, which is essential for a precise description of the electronic structure. A hybrid Weyl semimetal state with a pai... [Phys. Rev. Lett. 121, 136401] Published Tue Sep 25, 2018

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

Print ISSN: 0031-9007

Digitale ISSN: 1079-7114

Thema: Physik

Publiziert von American Physical Society (APS)

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Signatures of van Hove Singularities Probed by the Supercurrent in a Graphene-hBN Superlattice (2018)

D. I. Indolese, R. Delagrange, P. Makk, J. R. Wallbank, K. Wanatabe, T. Taniguchi, and C. Schönenberger

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): D. I. Indolese, R. Delagrange, P. Makk, J. R. Wallbank, K. Wanatabe, T. Taniguchi, and C. Schönenberger The band structure of graphene can be strongly modified if its lattice is aligned with the one of a boron nitride substrate. A moiré superlattice forms, which manifests itself by the appearance of new Dirac points, accompanied by van Hove singularities. In this work, we present supercurrent measurem... [Phys. Rev. Lett. 121, 137701] Published Tue Sep 25, 2018

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Digitale ISSN: 1079-7114

Thema: Physik

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Landau Velocity for Collective Quantum Hall Breakdown in Bilayer Graphene (2018)

W. Yang, H. Graef, X. Lu, G. Zhang, T. Taniguchi, K. Watanabe, A. Bachtold, E. H. T. Teo, E. Baudin, E. Bocquillon, G. Fève, J-M. Berroir, D. Carpentier, M. O. Goerbig, and B. Plaçais

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): W. Yang, H. Graef, X. Lu, G. Zhang, T. Taniguchi, K. Watanabe, A. Bachtold, E. H. T. Teo, E. Baudin, E. Bocquillon, G. Fève, J-M. Berroir, D. Carpentier, M. O. Goerbig, and B. Plaçais Breakdown of the quantum Hall effect (QHE) is commonly associated with an electric field approaching the inter-Landau-level (LL) Zener field, the ratio of the Landau gap and the cyclotron radius. Eluded in semiconducting heterostructures, in spite of extensive investigation, the intrinsic Zener limi... [Phys. Rev. Lett. 121, 136804] Published Tue Sep 25, 2018

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Thema: Physik

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Level Attraction Due to Dissipative Magnon-Photon Coupling (2018)

M. Harder, Y. Yang, B. M. Yao, C. H. Yu, J. W. Rao, Y. S. Gui, R. L. Stamps, and C.-M. Hu

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-09-26

Beschreibung: Author(s): M. Harder, Y. Yang, B. M. Yao, C. H. Yu, J. W. Rao, Y. S. Gui, R. L. Stamps, and C.-M. Hu The observation of level attraction between magnons and cavity photons in a solid state system suggests it may be as ubiquitous as level repulsion, with consequences for the field of cavitronics. [Phys. Rev. Lett. 121, 137203] Published Tue Sep 25, 2018

Schlagwort(e): Condensed Matter: Electronic Properties, etc.

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Quantum correlations and thermodynamic performances of two-qubit engines with local and common baths (2018)

Adam Hewgill, Alessandro Ferraro, and Gabriele De Chiara

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-10-03

Beschreibung: Author(s): Adam Hewgill, Alessandro Ferraro, and Gabriele De Chiara We investigate heat engines whose working substance is made of two coupled qubits performing a generalized Otto cycle by varying their applied magnetic field or their interaction strength during the compression and expansion strokes. During the heating and cooling strokes, the two qubits are coupled... [Phys. Rev. A 98, 042102] Published Tue Oct 02, 2018

Schlagwort(e): Fundamental concepts

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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