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Majorana corner states in a two-dimensional magnetic topological insulator on a high-temperature superconductor (2018)

Tao Liu, James Jun He, and Franco Nori (野理)

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Tao Liu, James Jun He, and Franco Nori (野理) Conventional n -dimensional topological superconductors (TSCs) have protected gapless ( n − 1 ) -dimensional boundary states. In contrast to this, second-order TSCs are characterized by topologically protected gapless ( n − 2 ) -dimensional states with the usual gapped ( n − 1 ) boundaries. Here, we study a second... [Phys. Rev. B 98, 245413] Published Thu Dec 13, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

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Thema: Physik

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Effect of non-Gaussian lensing deflections on CMB lensing measurements (2018)

Vanessa Böhm, Blake D. Sherwin, Jia Liu, J. Colin Hill, Marcel Schmittfull, and Toshiya Namikawa

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Vanessa Böhm, Blake D. Sherwin, Jia Liu, J. Colin Hill, Marcel Schmittfull, and Toshiya Namikawa We investigate the impact of non-Gaussian lensing deflections on measurements of the CMB lensing power spectrum. We find that the false assumption of their Gaussianity significantly biases these measurements in current and future experiments at the percent level. The bias is detected by comparing CM... [Phys. Rev. D 98, 123510] Published Thu Dec 13, 2018

Schlagwort(e): Cosmology

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Thema: Physik

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Merger rate of a subdominant population of primordial black holes (2018)

Bradley J. Kavanagh, Daniele Gaggero, and Gianfranco Bertone

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Bradley J. Kavanagh, Daniele Gaggero, and Gianfranco Bertone The formation of astrophysical and primordial black holes influences the distribution of dark matter surrounding them. Black holes are thus expected to carry a dark matter “dress” whose properties depend on their formation mechanism and on the properties of the environment. Here we carry out a numer... [Phys. Rev. D 98, 023536] Published Wed Jul 25, 2018

Schlagwort(e): Cosmology

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Entanglement spectrum of mixed states (2018)

Evert van Nieuwenburg and Oded Zilberberg

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Evert van Nieuwenburg and Oded Zilberberg Entanglement plays an important role in our ability to understand, simulate, and harness quantum many-body phenomena. In this work, we investigate the entanglement spectrum for open one-dimensional (1D) systems and propose a natural quantifier for how much a 1D quantum state is entangled while being... [Phys. Rev. A 98, 012327] Published Wed Jul 25, 2018

Schlagwort(e): Quantum information

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Thema: Physik

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Multilayer-by-multilayer surface melting of Cu(200) (2018)

Kai Wang, Haizhen Wu, Mengke Ge, Xingang Hou, Ning Liu, Jia He, Wei Xi, and Jun Luo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Kai Wang, Haizhen Wu, Mengke Ge, Xingang Hou, Ning Liu, Jia He, Wei Xi, and Jun Luo It is well known that surface melting of metal materials is caused by vacancies, and melting proceeds layer by layer in theoretical predictions. However, the melting process has rarely been directly investigated in real time at atomic resolution. Herein, the (200) surface-melting process of Cu nanop... [Phys. Rev. B 98, 045425] Published Wed Jul 25, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Closed-form expressions for effective constitutive parameters: Electrostrictive and magnetostrictive tensors for bianisotropic metamaterials and their use in optical force density calculations (2018)

Neng Wang, Shubo Wang, Zhao-Qing Zhang, and C. T. Chan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Neng Wang, Shubo Wang, Zhao-Qing Zhang, and C. T. Chan Using a multiple scattering technique, we derived closed-form expressions for effective constitutive parameters and electro/magneto-strictive tensor components for 2D bianisotropic metamaterials. Using the principle of virtual work, we obtained the electromagnetic stress tensor that can be used to c... [Phys. Rev. B 98, 045426] Published Wed Jul 25, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Impact of the cosmic variance on ${H}_{0}$ on cosmological analyses (2018)

David Camarena and Valerio Marra

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): David Camarena and Valerio Marra The current 3.8 σ tension between local [A. G. Riess et al. , arXiv:1804.10655 .] and global [N. Aghanim et al. (Planck Collaboration), Astron. Astrophys. 596 , A107 (2016) .] measurements of H 0 cannot be fully explained by the concordance Λ CDM model. It could be produced by unknown systematics or by p... [Phys. Rev. D 98, 023537] Published Wed Jul 25, 2018

Schlagwort(e): Cosmology

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Linear point standard ruler for galaxy survey data: Validation with mock catalogs (2018)

Stefano Anselmi, Pier-Stefano Corasaniti, Glenn D. Starkman, Ravi K. Sheth, and Idit Zehavi

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Stefano Anselmi, Pier-Stefano Corasaniti, Glenn D. Starkman, Ravi K. Sheth, and Idit Zehavi Due to late-time nonlinearities, the location of the acoustic peak in the two-point galaxy correlation function is a redshift-dependent quantity, and thus it cannot be simply employed as a cosmological standard ruler. This has motivated the recent proposal of a novel ruler, also located in the baryo... [Phys. Rev. D 98, 023527] Published Wed Jul 25, 2018

Schlagwort(e): Cosmology

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Unifying framework for spatial and temporal quantum correlations (2018)

Fabio Costa, Martin Ringbauer, Michael E. Goggin, Andrew G. White, and Alessandro Fedrizzi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Fabio Costa, Martin Ringbauer, Michael E. Goggin, Andrew G. White, and Alessandro Fedrizzi Measurements on a single quantum system at different times reveal rich nonclassical correlations similar to those observed in spatially separated multipartite systems. Here we introduce a theory framework that unifies the description of temporal, spatial, and spatiotemporal resources for quantum cor... [Phys. Rev. A 98, 012328] Published Thu Jul 26, 2018

Schlagwort(e): Quantum information

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Engineering quantum spin liquids and many-body Majorana states with a driven superconducting box circuit (2018)

Fan Yang, Loïc Henriet, Ariane Soret, and Karyn Le Hur

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Fan Yang, Loïc Henriet, Ariane Soret, and Karyn Le Hur We design a driven superconducting box with four spins S = 1 / 2 (qubits) such that coupled devices can give insight on the occurrence of quantum spin liquids and many-body Majorana states. Within one box or island, we introduce a generalized nuclear magnetic resonance algorithm to realize our models an... [Phys. Rev. B 98, 035431] Published Thu Jul 26, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Fingerprints of Berry phases in the bulk exciton spectrum of a topological insulator (2018)

Andrew A. Allocca, Dmitry K. Efimkin, and Victor M. Galitski

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Andrew A. Allocca, Dmitry K. Efimkin, and Victor M. Galitski We examine excitons formed in the bulk of a topological insulator as the system is tuned via a parameter between topological and trivial insulating phases, arguing that nontrivial topology has fingerprints in the spectrum of these excitons. The closely related hydrogen atom problem is well known to ... [Phys. Rev. B 98, 045430] Published Fri Jul 27, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Structural, vibrational, and electronic properties of single-layer hexagonal crystals of group IV and V elements (2018)

Burak Özdamar, Gözde Özbal, M. Neşet Çınar, Koray Sevim, Gizem Kurt, Birnur Kaya, and Hâldun Sevinçli

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Burak Özdamar, Gözde Özbal, M. Neşet Çınar, Koray Sevim, Gizem Kurt, Birnur Kaya, and Hâldun Sevinçli Using first-principles density functional theory calculations, we investigate a family of stable two-dimensional crystals with chemical formula A 2 B 2 , where A and B belong to groups IV and V, respectively ( A = C , Si, Ge, Sn, Pb; B = N , P, As, Sb, Bi). Two structural symmetries of hexagonal lattices P 6 ¯ m 2 ... [Phys. Rev. B 98, 045431] Published Fri Jul 27, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Exploring axionlike particles beyond the canonical setup (2018)

Gonzalo Alonso-Álvarez and Joerg Jaeckel

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Gonzalo Alonso-Álvarez and Joerg Jaeckel Axionlike particles (ALPs) are interesting dark matter candidates from both the theoretical and the experimental perspective. Usually they are motivated as pseudo-Nambu-Goldstone bosons. In this case one of their most important features is that their coupling to other particles is suppressed by a la... [Phys. Rev. D 98, 023539] Published Fri Jul 27, 2018

Schlagwort(e): Cosmology

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Interplay between speed and fidelity in off-resonant quantum-state-transfer protocols (2018)

Guilherme M. A. Almeida

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): Guilherme M. A. Almeida An arbitrary qubit can be transmitted through a spin chain by perturbatively coupling both communicating parties to it. These so-called weak-coupling models rely on effective Rabi oscillations between the outer spins, yielding nearly maximum fidelity while offering great resilience against disorder ... [Phys. Rev. A 98, 012334] Published Mon Jul 30, 2018

Schlagwort(e): Quantum information

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Phase transitions on a ladder of braided non-Abelian anyons (2018)

Babatunde M. Ayeni, Robert N. C. Pfeifer, and Gavin K. Brennen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): Babatunde M. Ayeni, Robert N. C. Pfeifer, and Gavin K. Brennen Non-Abelian anyons can exist as pointlike particles in two-dimensional systems and have particle exchange statistics which are neither bosonic nor fermionic. Like in spin systems, the role of fusion (Heisenberg-like) interactions between anyons has been well studied. However, unlike our understandin... [Phys. Rev. B 98, 045432] Published Mon Jul 30, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Quantum compiling with diffusive sets of gates (2018)

Y. Zhiyenbayev, V. M. Akulin, and A. Mandilara

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Y. Zhiyenbayev, V. M. Akulin, and A. Mandilara Given a set of quantum gates and a target unitary operation, the most elementary task of quantum compiling is the identification of a sequence of the gates that approximates the target unitary to a determined precision ɛ . The Solovay-Kitaev theorem provides an elegant solution which is based on the ... [Phys. Rev. A 98, 012325] Published Tue Jul 24, 2018

Schlagwort(e): Quantum information

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Higgs field-curvature coupling and postinflationary vacuum instability (2018)

Daniel G. Figueroa, Arttu Rajantie, and Francisco Torrenti

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Daniel G. Figueroa, Arttu Rajantie, and Francisco Torrenti We study the postinflationary dynamics of the Standard Model (SM) Higgs field in the presence of a nonminimal coupling ξ | Φ | 2 R to gravity, both with and without the electroweak gauge fields coupled to the Higgs field. We assume a minimal scenario in which inflation and reheating are caused by chaotic... [Phys. Rev. D 98, 023532] Published Tue Jul 24, 2018

Schlagwort(e): Cosmology

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Mitigating foreground biases in CMB lensing reconstruction using cleaned gradients (2018)

Mathew S. Madhavacheril and J. Colin Hill

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Mathew S. Madhavacheril and J. Colin Hill Reconstructed maps of the lensing convergence of the cosmic microwave background (CMB) will play a major role in precision cosmology in coming years. CMB lensing maps will enable calibration of the masses of high-redshift galaxy clusters and will yield precise measurements of the growth of cosmic st... [Phys. Rev. D 98, 023534] Published Tue Jul 24, 2018

Schlagwort(e): Cosmology

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Several nonlocal sets of multipartite pure orthogonal product states (2018)

Saronath Halder

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-04

Beschreibung: Author(s): Saronath Halder It is known that there exist sets of pure orthogonal product states which cannot be perfectly distinguished by local operations and classical communication (LOCC). Such sets are nonlocal sets which exhibit nonlocality without entanglement. These nonlocal sets can be completable or uncompletable. In ... [Phys. Rev. A 98, 022303] Published Fri Aug 03, 2018

Schlagwort(e): Quantum information

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Robust readout of bosonic qubits in the dispersive coupling regime (2018)

Connor T. Hann, Salvatore S. Elder, Christopher S. Wang, Kevin Chou, Robert J. Schoelkopf, and Liang Jiang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Connor T. Hann, Salvatore S. Elder, Christopher S. Wang, Kevin Chou, Robert J. Schoelkopf, and Liang Jiang High-fidelity qubit measurements play a crucial role in quantum computation, communication, and metrology. In recent experiments, it has been shown that readout fidelity can be improved by performing repeated quantum nondemolition (QND) readouts of a qubit's state through an ancilla. For a qubit enc... [Phys. Rev. A 98, 022305] Published Mon Aug 06, 2018

Schlagwort(e): Quantum information

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Interrelation between partial coherence and quantum correlations (2018)

Sunho Kim, Longsuo Li, Asutosh Kumar, and Junde Wu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Sunho Kim, Longsuo Li, Asutosh Kumar, and Junde Wu Both coherence and entanglement stem from the superposition principle, capture quantumness of a physical system, and play a central role in quantum physics. In a multipartite quantum system, coherence and quantum correlations are closely connected. In particular, it has been established that quantum... [Phys. Rev. A 98, 022306] Published Mon Aug 06, 2018

Schlagwort(e): Quantum information

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Andreev transport through single-molecule magnets (2018)

F. Pawlicki and I. Weymann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): F. Pawlicki and I. Weymann The Andreev transport through a large-spin magnetic molecule, such as a single molecular magnet, attached to superconducting and ferromagnetic leads is studied theoretically by means of the real-time diagrammatic technique. It is shown that due to the proximity effect, molecular Andreev bound states... [Phys. Rev. B 98, 085411] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Two-phonon Raman bands of single-walled carbon nanotubes: A case study (2018)

Valentin N. Popov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Valentin N. Popov It has been long accepted that the second-order Raman bands in carbon nanotubes are enhanced through the double-resonance mechanism. Although separate aspects of this mechanism have been studied for a few second-order Raman bands, including the most intense defect-induced D band and the two-phonon 2... [Phys. Rev. B 98, 085413] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Shubnikov–de Haas oscillations in the anomalous Hall conductivity of Chern insulators (2018)

Luis M. Canonico, Jose H. García, Tatiana G. Rappoport, Aires Ferreira, and R. B. Muniz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Luis M. Canonico, Jose H. García, Tatiana G. Rappoport, Aires Ferreira, and R. B. Muniz The Haldane model on a honeycomb lattice is a paradigmatic example of a system featuring quantized Hall conductivity in the absence of an external magnetic field, that is, a quantum anomalous Hall effect. Recent theoretical work predicted that the anomalous Hall conductivity of massive Dirac fermion... [Phys. Rev. B 98, 085409] Published Mon Aug 06, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Lagrangian theory of structure formation in relativistic cosmology. V. Irrotational fluids (2018)

Yong-Zhuang Li, Pierre Mourier, Thomas Buchert, and David L. Wiltshire

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Yong-Zhuang Li, Pierre Mourier, Thomas Buchert, and David L. Wiltshire We extend the general relativistic Lagrangian perturbation theory, recently developed for the formation of cosmic structures in a dust continuum, to the case of model universes containing a single fluid with a single-valued analytic equation of state. Using a coframe-based perturbation approach, we ... [Phys. Rev. D 98, 043507] Published Tue Aug 07, 2018

Schlagwort(e): Cosmology

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Second harmonic generation in the plasmon-polariton gap of quasiperiodic metamaterial photonic superlattices (2018)

F. Reyes Gómez, N. Porras-Montenegro, Osvaldo N. Oliveira, Jr., and J. R. Mejía-Salazar

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): F. Reyes Gómez, N. Porras-Montenegro, Osvaldo N. Oliveira, Jr., and J. R. Mejía-Salazar Self-similar bulk plasmon-polariton modes in quasiperiodic photonic superlattices were used here for a giant enhancement of second harmonic generation. Results for Fibonacci and Thue-Morse-like superlattices indicate that not only the disorder but also the symmetry of the unit cell plays a crucial r... [Phys. Rev. B 98, 075406] Published Tue Aug 07, 2018

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Imprints of gravitational lensing in the Planck cosmic microwave background data at the location of $WISE×\mathrm{SCOS}$ galaxies (2018)

Srinivasan Raghunathan, Federico Bianchini, and Christian L. Reichardt

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Srinivasan Raghunathan, Federico Bianchini, and Christian L. Reichardt We detect weak gravitational lensing of the cosmic microwave background at the location of the W I S E × SuperCOSMOS ( W I S E × SCOS ) galaxies using the publicly available Planck lensing convergence map. By stacking the lensing convergence map at the position of 12.4 million galaxies in the redshift range 0.1 ... [Phys. Rev. D 98, 043506] Published Mon Aug 06, 2018

Schlagwort(e): Cosmology

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Inflation in an effective gravitational model and asymptotic safety (2018)

Lei-Hua Liu, Tomislav Prokopec, and Alexei A. Starobinsky

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Lei-Hua Liu, Tomislav Prokopec, and Alexei A. Starobinsky We consider an inflationary model motivated by quantum effects of gravitational and matter fields near the Planck scale. Our Lagrangian is a resummed version of the effective Lagrangian recently obtained by Demmel, Saueressig, and Zanusso [A proper fixed functional for four-dimensional quantum Einst... [Phys. Rev. D 98, 043505] Published Mon Aug 06, 2018

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Testing the cosmic anisotropy with supernovae data: Hemisphere comparison and dipole fitting (2018)

Hua-Kai Deng and Hao Wei

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-06-12

Beschreibung: Author(s): Hua-Kai Deng and Hao Wei The cosmological principle is one of the cornerstones in modern cosmology. It assumes that the universe is homogeneous and isotropic on cosmic scales. Both the homogeneity and the isotropy of the universe should be tested carefully. In the present work, we are interested in probing the possible pref... [Phys. Rev. D 97, 123515] Published Mon Jun 11, 2018

Schlagwort(e): Cosmology

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Entanglement enhancement in multimode integrated circuits (2018)

Zacharie M. Léger, Aharon Brodutch, and Amr S. Helmy

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Zacharie M. Léger, Aharon Brodutch, and Amr S. Helmy The faithful distribution of entanglement in continuous-variable systems is essential to many quantum information protocols. As such, entanglement distillation and enhancement schemes are a cornerstone of many applications. The photon subtraction scheme offers enhancement with a relatively simple se... [Phys. Rev. A 97, 062303] Published Mon Jun 04, 2018

Schlagwort(e): Quantum information

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Polarization-controlled coherent phonon generation in acoustoplasmonic metasurfaces (2018)

Norberto D. Lanzillotti-Kimura, Kevin P. O’Brien, Junsuk Rho, Haim Suchowski, Xiaobo Yin, and Xiang Zhang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Norberto D. Lanzillotti-Kimura, Kevin P. O’Brien, Junsuk Rho, Haim Suchowski, Xiaobo Yin, and Xiang Zhang Acoustic vibrations at the nanoscale (GHz-THz frequencies) and their interactions with electrons, photons, and other excitations are the heart of an emerging field in physics: nanophononics. The design of ultrahigh frequency acoustic-phonon transducers, with tunable frequency, and easy to integrate ... [Phys. Rev. B 97, 235403] Published Mon Jun 04, 2018

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Intrinsic and anisotropic Rashba spin splitting in Janus transition-metal dichalcogenide monolayers (2018)

Tao Hu, Fanhao Jia, Guodong Zhao, Jiongyao Wu, Alessandro Stroppa, and Wei Ren

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Tao Hu, Fanhao Jia, Guodong Zhao, Jiongyao Wu, Alessandro Stroppa, and Wei Ren Transition-metal dichalcogenides (TMDs) monolayers have been considered as important two-dimensional semiconductor materials for the study of fundamental physics in the field of spintronics. However, the out-of-plane mirror symmetry in TMDs may constrain electrons' degrees of freedom and it may limi... [Phys. Rev. B 97, 235404] Published Mon Jun 04, 2018

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Model independent inference of the expansion history and implications for the growth of structure (2018)

Shahab Joudaki, Manoj Kaplinghat, Ryan Keeley, and David Kirkby

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Shahab Joudaki, Manoj Kaplinghat, Ryan Keeley, and David Kirkby A “crisis in cosmology” is lurking in recent measurements of the Hubble constant H 0 (the current expansion rate of the Universe), caused by a tension between direct observations through distance measurements and an inferred value, computed with the standard model of cosmology ( Λ CDM) from CMB data. The latter involves an approx. 13 billion years time evolution. The authors use statistical methods to analyze different available data sets from different kind of observations that carry information about different moments from the evolution of the Universe, to determine H 0 in a model independent way, making only minimal basic assumptions, and find that the tension with direct observation of H 0 persists. [Phys. Rev. D 97, 123501] Published Mon Jun 04, 2018

Schlagwort(e): Cosmology

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Interface-induced spin-orbit interaction in silicon quantum dots and prospects for scalability (2018)

Rifat Ferdous, Kok W. Chan, Menno Veldhorst, J. C. C. Hwang, C. H. Yang, Harshad Sahasrabudhe, Gerhard Klimeck, Andrea Morello, Andrew S. Dzurak, and Rajib Rahman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Rifat Ferdous, Kok W. Chan, Menno Veldhorst, J. C. C. Hwang, C. H. Yang, Harshad Sahasrabudhe, Gerhard Klimeck, Andrea Morello, Andrew S. Dzurak, and Rajib Rahman We identify the presence of monatomic steps at the Si/SiGe or Si / SiO 2 interface as a dominant source of variations in the dephasing time of silicon (Si) quantum dot (QD) spin qubits. First, using atomistic tight-binding calculations we show that the g -factors and their Stark shifts undergo variation... [Phys. Rev. B 97, 241401(R)] Published Mon Jun 04, 2018

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Strong and weak second-order topological insulators with hexagonal symmetry and ℤ${}_{3}$ index (2018)

Motohiko Ezawa

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Motohiko Ezawa We propose second-order topological insulators (SOTIs) whose lattice structure has a hexagonal symmetry C 6 . We start with a three-dimensional weak topological insulator constructed on a stacked triangular lattice, which has only side topological surface states. We then introduce an additional mass t... [Phys. Rev. B 97, 241402(R)] Published Mon Jun 04, 2018

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Postinflationary scalar tensor cosmology and inflationary parameters (2018)

Anshuman Maharana and Ivonne Zavala

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-06-14

Beschreibung: Author(s): Anshuman Maharana and Ivonne Zavala Scalar fields provide attractive modifications of pre-BBN cosmology, which have interesting implications for dark matter abundances. We analyze the effect of these modifications on the number of e -foldings between the horizon exit of cosmic microwave background modes and the end of inflation ( N k ) , a... [Phys. Rev. D 97, 123518] Published Wed Jun 13, 2018

Schlagwort(e): Cosmology

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Tensor network states in time-bin quantum optics (2018)

Michael Lubasch, Antonio A. Valido, Jelmer J. Renema, W. Steven Kolthammer, Dieter Jaksch, M. S. Kim, Ian Walmsley, and Raúl García-Patrón

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Michael Lubasch, Antonio A. Valido, Jelmer J. Renema, W. Steven Kolthammer, Dieter Jaksch, M. S. Kim, Ian Walmsley, and Raúl García-Patrón The current shift in the quantum optics community towards experiments with many modes and photons necessitates new classical simulation techniques that efficiently encode many-body quantum correlations and go beyond the usual phase-space formulation. To address this pressing demand we formulate line... [Phys. Rev. A 97, 062304] Published Tue Jun 05, 2018

Schlagwort(e): Quantum information

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Strong and uniform convergence in the teleportation simulation of bosonic Gaussian channels (2018)

Mark M. Wilde

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Mark M. Wilde In the literature on the continuous-variable bosonic teleportation protocol due to Braunstein and Kimble [ Phys. Rev. Lett. 80 , 869 (1998) ], it is often loosely stated that this protocol converges to a perfect teleportation of an input state in the limit of ideal squeezing and ideal detection, but th... [Phys. Rev. A 97, 062305] Published Tue Jun 05, 2018

Schlagwort(e): Quantum information

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Clocks in Feynman's computer and Kitaev's local Hamiltonian: Bias, gaps, idling, and pulse tuning (2018)

Libor Caha, Zeph Landau, and Daniel Nagaj

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Libor Caha, Zeph Landau, and Daniel Nagaj We present a collection of results about the clock in Feynman's computer construction and Kitaev's local Hamiltonian problem. First, by analyzing the spectra of quantum walks on a line with varying end-point terms, we find a better lower bound on the gap of the Feynman Hamiltonian, which translates ... [Phys. Rev. A 97, 062306] Published Tue Jun 05, 2018

Schlagwort(e): Quantum information

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Device independence for two-party cryptography and position verification with memoryless devices (2018)

Jérémy Ribeiro, Le Phuc Thinh, Jędrzej Kaniewski, Jonas Helsen, and Stephanie Wehner

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Jérémy Ribeiro, Le Phuc Thinh, Jędrzej Kaniewski, Jonas Helsen, and Stephanie Wehner Quantum communication has demonstrated its usefulness for quantum cryptography far beyond quantum key distribution. One domain is two-party cryptography, whose goal is to allow two parties who may not trust each other to solve joint tasks. Another interesting application is position-based cryptograp... [Phys. Rev. A 97, 062307] Published Tue Jun 05, 2018

Schlagwort(e): Quantum information

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Asymptotic quantum algorithm for the Toeplitz systems (2018)

Lin-Chun Wan, Chao-Hua Yu, Shi-Jie Pan, Fei Gao, Qiao-Yan Wen, and Su-Juan Qin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Lin-Chun Wan, Chao-Hua Yu, Shi-Jie Pan, Fei Gao, Qiao-Yan Wen, and Su-Juan Qin Solving the Toeplitz systems, which involves finding the vector x such that T n x = b given an n × n Toeplitz matrix T n and a vector b , has a variety of applications in mathematics and engineering. In this paper, we present a quantum algorithm for solving the linear equations of Toeplitz matrices, in whic... [Phys. Rev. A 97, 062322] Published Fri Jun 15, 2018

Schlagwort(e): Quantum information

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Scale-invariant freezing of entanglement (2018)

Titas Chanda, Tamoghna Das, Debasis Sadhukhan, Amit Kumar Pal, Aditi Sen(De), and Ujjwal Sen

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Titas Chanda, Tamoghna Das, Debasis Sadhukhan, Amit Kumar Pal, Aditi Sen(De), and Ujjwal Sen We show that bipartite entanglement in an one-dimensional quantum spin model undergoing time evolution due to local Markovian environments can be frozen over time. We demonstrate this by using a number of paradigmatic quantum spin models including the anisotropic X Y model in the presence of a unifor... [Phys. Rev. A 97, 062324] Published Fri Jun 15, 2018

Schlagwort(e): Quantum information

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Berry curvature in monolayer ${\mathrm{MoS}}_{2}$ with broken mirror symmetry (2018)

Kyung-Han Kim and Hyun-Woo Lee

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Kyung-Han Kim and Hyun-Woo Lee An ideal 1 H phase monolayer MoS 2 has mirror reflection symmetry, but this symmetry is broken in common experimental situations, where the monolayer is placed on a substrate. By using k · p perturbation theory, we investigate the effect of mirror symmetry breaking on the Berry curvature of the material... [Phys. Rev. B 97, 235423] Published Fri Jun 15, 2018

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Quasiprobability representation of quantum coherence (2018)

J. Sperling and I. A. Walmsley

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-20

Beschreibung: Author(s): J. Sperling and I. A. Walmsley We introduce a general method for the construction of quasiprobability representations for arbitrary notions of quantum coherence. Our technique yields a non-negative probability distribution for the decomposition of any classical state. Conversely, quantum phenomena are certified in terms of signed... [Phys. Rev. A 97, 062327] Published Tue Jun 19, 2018

Schlagwort(e): Quantum information

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Exciton-polarons in doped semiconductors in a strong magnetic field (2018)

Dmitry K. Efimkin and Allan H. Mac; Donald

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-22

Beschreibung: Author(s): Dmitry K. Efimkin and Allan H. MacDonald In previous work, we have argued that the optical properties of moderately doped two-dimensional semiconductors can be described in terms of excitons dressed by their interactions with a degenerate Fermi sea of additional charge carriers. These interactions split the bare exciton into attractive and... [Phys. Rev. B 97, 235432] Published Thu Jun 21, 2018

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Atomic visualization of copper oxide structure in the infinite-layer cuprate $\mathrm{SrCu}{\mathrm{O}}_{2}$ (2018)

Yong Zhong, Sha Han, Yang Wang, Zhiling Luo, Ding Zhang, Lili Wang, Wei Li, Ke He, Can-Li Song, Xu-Cun Ma, and Qi-Kun Xue

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): Yong Zhong, Sha Han, Yang Wang, Zhiling Luo, Ding Zhang, Lili Wang, Wei Li, Ke He, Can-Li Song, Xu-Cun Ma, and Qi-Kun Xue We report the atomic-scale structure of epitaxial films of the parent infinite-layer compound SrCu O 2 prepared on SrTiO 3 by molecular beam epitaxy. In situ scanning tunneling microscopy study reveals a stoichiometric copper oxide ( CuO 2 ) -terminated surface featured by 2 × 2 reconstruction, caused prima... [Phys. Rev. B 97, 245420] Published Fri Jun 22, 2018

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Temperature-dependent terahertz spectroscopy of inverted-band three-layer InAs/GaSb/InAs quantum well (2018)

S. S. Krishtopenko, S. Ruffenach, F. Gonzalez-Posada, G. Boissier, M. Marcinkiewicz, M. A. Fadeev, A. M. Kadykov, V. V. Rumyantsev, S. V. Morozov, V. I. Gavrilenko, C. Consejo, W. Desrat, B. Jouault, W. Knap, E. Tournié, and F. Teppe

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): S. S. Krishtopenko, S. Ruffenach, F. Gonzalez-Posada, G. Boissier, M. Marcinkiewicz, M. A. Fadeev, A. M. Kadykov, V. V. Rumyantsev, S. V. Morozov, V. I. Gavrilenko, C. Consejo, W. Desrat, B. Jouault, W. Knap, E. Tournié, and F. Teppe We report on temperature-dependent terahertz spectroscopy of a three-layer InAs/GaSb/InAs quantum well (QW) with inverted-band structure. The interband optical transitions, measured up to 16 T at different temperatures by Landau-level magnetospectroscopy, demonstrate the inverted-band structure of t... [Phys. Rev. B 97, 245419] Published Fri Jun 22, 2018

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Confronting Kähler moduli inflation with CMB data (2018)

Sukannya Bhattacharya, Koushik Dutta, Mayukh Raj Gangopadhyay, and Anshuman Maharana

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): Sukannya Bhattacharya, Koushik Dutta, Mayukh Raj Gangopadhyay, and Anshuman Maharana In models of inflation obtained from string compactification, moduli vacuum misalignment leads to an epoch in the postinflationary history of the Universe when the energy density is dominated by cold moduli particles. This effect leads to a modification in the number of e -foldings ( N pivot ) between t... [Phys. Rev. D 97, 123533] Published Fri Jun 22, 2018

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Molecular dynamics studies of ion beam implantation and patterning of silicon: Effect of noble gas cluster formation (2018)

Michael A. Lively, Samuel X. Bennett, and Jean Paul Allain

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-27

Beschreibung: Author(s): Michael A. Lively, Samuel X. Bennett, and Jean Paul Allain The use of energetic ion beams to induce nanopattern formation at surfaces has been well studied both experimentally and theoretically. However, the influence on morphological evolution of the implanted species themselves remains little understood, particularly in the case when the incident ion spec... [Phys. Rev. B 97, 235443] Published Tue Jun 26, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Magnetoplasmonic enhancement of Faraday rotation in patterned graphene metasurfaces (2018)

Michele Tamagnone, Tetiana M. Slipchenko, Clara Moldovan, Peter Q. Liu, Alba Centeno, Hamed Hasani, Amaia Zurutuza, Adrian M. Ionescu, Luis Martin-Moreno, Jérôme Faist, Juan R. Mosig, Alexey B. Kuzmenko, and Jean-Marie Poumirol

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-27

Beschreibung: Author(s): Michele Tamagnone, Tetiana M. Slipchenko, Clara Moldovan, Peter Q. Liu, Alba Centeno, Hamed Hasani, Amaia Zurutuza, Adrian M. Ionescu, Luis Martin-Moreno, Jérôme Faist, Juan R. Mosig, Alexey B. Kuzmenko, and Jean-Marie Poumirol Faraday rotation is a fundamental property present in all nonreciprocal optical elements. In the THz range, graphene displays strong Faraday rotation; unfortunately, it is limited to frequencies below the cyclotron resonance. Here, we show experimentally that in specifically designed metasurfaces, m... [Phys. Rev. B 97, 241410(R)] Published Tue Jun 26, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Phantom crossing dark energy in Horndeski’s theory (2018)

Jiro Matsumoto

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2018-06-27

Beschreibung: Author(s): Jiro Matsumoto The Λ CDM model is a remarkably successful model which is consistent with the observations of cosmic microwave background radiation (CMB), baryon acoustic oscillation (BAO), and the large scale structure of the Universe. However, the discrepancy in the value of H 0 between the local observations and P... [Phys. Rev. D 97, 123538] Published Tue Jun 26, 2018

Schlagwort(e): Cosmology

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Optimization-free measures of quantum resources (2018)

Nikolaos K. Kollas

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): Nikolaos K. Kollas A closed expression is derived for the amount of resource present in a quantum state as quantified by a distance measure based on the Tsallis relative entropy introduced recently [H. Zhao and C.-s. Yu, Sci. Rep. 8 , 299 (2018) ], for any resource theory whose set of free states is described by the ima... [Phys. Rev. A 97, 062344] Published Wed Jun 27, 2018

Schlagwort(e): Quantum information

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Band-edge levels of the NaCl(100) surface: Self-consistent hybrid density functional theory compared to many-body perturbation theory (2018)

Manuel Hochheim and Thomas Bredow

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): Manuel Hochheim and Thomas Bredow The electronic gap of bulk NaCl and the band-edge levels of the NaCl(100) surface are calculated using GW methods and self-consistent dielectric dependent hybrid functionals. Optical spectra are calculated by solving the Bethe-Salpeter equations (GW-BSE). For the calculation of the electronic struct... [Phys. Rev. B 97, 235447] Published Wed Jun 27, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Interplay of the Kondo effect with the induced pairing in electronic and caloric properties of T-shaped double quantum dots (2018)

Krzysztof P. Wójcik and Ireneusz Weymann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): Krzysztof P. Wójcik and Ireneusz Weymann We examine the influence of the superconducting proximity effect on the transport properties of a T-shaped double quantum dot strongly coupled to two normal, nonmagnetic or ferromagnetic leads. We show that the two-stage Kondo screening may be suppressed or enhanced by the presence of pairing correl... [Phys. Rev. B 97, 235449] Published Wed Jun 27, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Measuring the Rényi entropy of a two-site Fermi-Hubbard model on a trapped ion quantum computer (2018)

N. M. Linke, S. Johri, C. Figgatt, K. A. Landsman, A. Y. Matsuura, and C. Monroe

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-27

Beschreibung: Author(s): N. M. Linke, S. Johri, C. Figgatt, K. A. Landsman, A. Y. Matsuura, and C. Monroe The efficient simulation of correlated quantum systems is a promising near-term application of quantum computers. Here, we present a measurement of the second Rényi entropy of the ground state of the two-site Fermi-Hubbard model on a five-qubit programmable quantum computer based on trapped ions. Ou... [Phys. Rev. A 98, 052334] Published Mon Nov 26, 2018

Schlagwort(e): Quantum information

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Dynamical quantum correlations after sudden quenches (2018)

Utkarsh Mishra, Hadi Cheraghi, Saeed Mahdavifar, R. Jafari, and Alireza Akbari

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-27

Beschreibung: Author(s): Utkarsh Mishra, Hadi Cheraghi, Saeed Mahdavifar, R. Jafari, and Alireza Akbari We employ the mean-field approach in the fermionic picture of the spin- 1 2 X X Z chain to investigate the dynamics of bipartite quantum discord and concurrence under sudden quenching. In this case, when quenching is performed in the anisotropy from an initial value to the critical point, the quantum co... [Phys. Rev. A 98, 052338] Published Mon Nov 26, 2018

Schlagwort(e): Quantum information

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Photon echoes from an atomic frequency comb affected by population relaxation (2018)

Devin Vega and Mingzhen Tian

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-27

Beschreibung: Author(s): Devin Vega and Mingzhen Tian The atomic frequency comb (AFC) is a promising approach for quantum memory, yet creating an ideal AFC only in the ground-state population remains a challenge. We studied an imperfect AFC initially created in the population inversion between the excited and ground states and redistributed due to popu... [Phys. Rev. A 98, 052340] Published Mon Nov 26, 2018

Schlagwort(e): Quantum information

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Measurement of the Casimir force in a gas and in a liquid (2018)

Anne Le Cunuder, Artyom Petrosyan, George Palasantzas, Vitaly Svetovoy, and Sergio Ciliberto

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-29

Beschreibung: Author(s): Anne Le Cunuder, Artyom Petrosyan, George Palasantzas, Vitaly Svetovoy, and Sergio Ciliberto We present detailed measurements of the Casimir-Lifshitz force between two gold surfaces, performed in both gas (nitrogen) and liquid (ethanol) environments with the same apparatus and on the same spot of the sample. Furthermore, we study the role of double-layer forces in the liquid, and we show th... [Phys. Rev. B 98, 201408(R)] Published Wed Nov 28, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Screening cloud and non-Fermi-liquid scattering in topological Kondo devices (2018)

A. Latief and B. Béri

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-29

Beschreibung: Author(s): A. Latief and B. Béri The topological Kondo effect arises when conduction electrons in metallic leads are coupled to a mesoscopic superconducting island with Majorana fermions. Working with its minimal setup, we study the lead electron local tunneling density of states in its thermally smeared form motivated by scanning ... [Phys. Rev. B 98, 205427] Published Wed Nov 28, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Blind quantum computation with a noise channel (2018)

Yu-Bo Sheng and Lan Zhou

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-28

Beschreibung: Author(s): Yu-Bo Sheng and Lan Zhou Blind quantum computation (BQC) is a type of quantum computation model. For a client (Alice) who does not have enough sophisticated technology and knowledge to perform universal quantum computation, BQC allows her to resort to a remote quantum computation server (Bob) to delegate universal quantum c... [Phys. Rev. A 98, 052343] Published Tue Nov 27, 2018

Schlagwort(e): Quantum information

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Geometric local-hidden-state model for some two-qubit states (2018)

Bai-Chu Yu, Zhih-Ahn Jia, Yu-Chun Wu, and Guang-Can Guo

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-28

Beschreibung: Author(s): Bai-Chu Yu, Zhih-Ahn Jia, Yu-Chun Wu, and Guang-Can Guo Adopting the geometric description of steering assemblages and the local-hidden-state (LHS) model, we construct the optimal LHS model for some two-qubit states under continuous projective measurements and obtain a sufficient steering criterion for all two-qubit states. Using the criterion, we show m... [Phys. Rev. A 98, 052345] Published Tue Nov 27, 2018

Schlagwort(e): Quantum information

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Preparing multiparticle entangled states of nitrogen-vacancy centers via adiabatic ground-state transitions (2018)

Yuan Zhou, Bo Li, Xiao-Xiao Li, Fu-Li Li, and Peng-Bo Li

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-28

Beschreibung: Author(s): Yuan Zhou, Bo Li, Xiao-Xiao Li, Fu-Li Li, and Peng-Bo Li We propose an efficient method to generate multiparticle entangled states of nitrogen-vacancy (NV) centers in a spin-mechanical system, where the spins interact through a collective coupling of the Lipkin-Meshkov-Glick (LMG) type. We show that through adiabatic transitions in the ground state of the... [Phys. Rev. A 98, 052346] Published Tue Nov 27, 2018

Schlagwort(e): Quantum information

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Quantum spatial search on graphs subject to dynamical noise (2018)

Marco Cattaneo, Matteo A. C. Rossi, Matteo G. A. Paris, and Sabrina Maniscalco

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-28

Beschreibung: Author(s): Marco Cattaneo, Matteo A. C. Rossi, Matteo G. A. Paris, and Sabrina Maniscalco We address quantum spatial search on graphs and its implementation by continuous-time quantum walks in the presence of dynamical noise. In particular, we focus on search on the complete graph and on the star graph of order N , also proving that noiseless spatial search shows optimal quantum speedup i... [Phys. Rev. A 98, 052347] Published Tue Nov 27, 2018

Schlagwort(e): Quantum information

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Single-photon heralded two-qubit unitary gates for pairs of nitrogen-vacancy centers in diamond (2018)

Chenxu Liu, M. V. Gurudev Dutt, and David Pekker

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-28

Beschreibung: Author(s): Chenxu Liu, M. V. Gurudev Dutt, and David Pekker The implementation of a high-fidelity two-qubit quantum logic gate remains an outstanding challenge for isolated solid-state qubits such as nitrogen-vacancy (NV) centers in diamond. In this work, we show that by driving pairs of NV centers to undergo photon scattering processes that flip their qubit... [Phys. Rev. A 98, 052342] Published Tue Nov 27, 2018

Schlagwort(e): Quantum information

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Alternative method for deriving nonlocal multipartite product states (2018)

Mao-Sheng Li and Yan-Ling Wang

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-11-30

Beschreibung: Author(s): Mao-Sheng Li and Yan-Ling Wang We can only perform finite rounds of measurements in protocols with local operations and classical communication (LOCC). In this paper, we propose a set of product states that require infinite rounds of measurements in order to distinguish this given set of states perfectly by LOCC. Therefore, we ca... [Phys. Rev. A 98, 052352] Published Thu Nov 29, 2018

Schlagwort(e): Quantum information

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Phonon-induced linewidths of graphene electronic states (2018)

Bo Hellsing, Thomas Frederiksen, Federico Mazzola, Thiagarajan Balasubramanian, and Justin W. Wells

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-30

Beschreibung: Author(s): Bo Hellsing, Thomas Frederiksen, Federico Mazzola, Thiagarajan Balasubramanian, and Justin W. Wells The linewidths of the π and σ bands originating from the electron-phonon coupling in graphene are analyzed based on model calculations and experimental angle-resolved photoemission spectroscopy (ARPES) data. We find evidence for crucial contributions to the lifetime broadening from interband scatter... [Phys. Rev. B 98, 205428] Published Thu Nov 29, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Possible flexoelectric origin of the Lifshitz transition in ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ interfaces (2018)

Amany Raslan and W. A. Atkinson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-01

Beschreibung: Author(s): Amany Raslan and W. A. Atkinson Multiple experiments have observed a sharp transition in the band structure of LaAlO 3 / SrTiO 3 (001) interfaces as a function of applied gate voltage. This Lifshitz transition, between a single occupied band at low electron density and multiple occupied bands at high density, is remarkable for its abr... [Phys. Rev. B 98, 195447] Published Fri Nov 30, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Spatial confinement, magnetic localization, and their interactions on massless Dirac fermions (2018)

Zhong-Qiu Fu, Yu Zhang, Jia-Bin Qiao, Dong-Lin Ma, Haiwen Liu, Zi-Han Guo, Yi-Cong Wei, Jing-Yi Hu, Qian Xiao, Xin-Rui Mao, and Lin He

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Zhong-Qiu Fu, Yu Zhang, Jia-Bin Qiao, Dong-Lin Ma, Haiwen Liu, Zi-Han Guo, Yi-Cong Wei, Jing-Yi Hu, Qian Xiao, Xin-Rui Mao, and Lin He Understanding different approaches to confining massless Dirac fermions in graphene is of keen interest to researchers; it is also a central problem in making electronic devices based on graphene. Here, we studied spatial confinement, magnetic localization, and their interactions on massless Dirac f... [Phys. Rev. B 98, 241401(R)] Published Mon Dec 03, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Sign inversion in the terahertz photoconductivity of single-walled carbon nanotube films (2018)

Peter Karlsen, Mikhail V. Shuba, Polina P. Kuzhir, Albert G. Nasibulin, Patrizia Lamberti, and Euan Hendry

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Peter Karlsen, Mikhail V. Shuba, Polina P. Kuzhir, Albert G. Nasibulin, Patrizia Lamberti, and Euan Hendry In recent years, there have been conflicting reports regarding the ultrafast photoconductive response of films of single walled carbon nanotubes (CNTs), which apparently exhibit photoconductivities that can differ even in sign. Here, we observe explicitly that the THz photoconductivity of CNT films ... [Phys. Rev. B 98, 241404(R)] Published Mon Dec 03, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Twisted graphene bilayer around the first magic angle engineered by heterostrain (2018)

Jia-Bin Qiao, Long-Jing Yin, and Lin He

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Jia-Bin Qiao, Long-Jing Yin, and Lin He Very recently, twisted graphene bilayers (TGBs) around the first magic angle θ ≈ 1 . 1 ∘ have attracted much attention for the realization of exotic quantum states, such as correlated insulator behavior and unconventional superconductivity. Here we elaborately study a series of TGBs around the first magi... [Phys. Rev. B 98, 235402] Published Mon Dec 03, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Proximity-induced spin-orbit coupling in graphene/${\mathrm{Bi}}_{1.5}{\mathrm{Sb}}_{0.5}{\mathrm{Te}}_{1.7}{\mathrm{Se}}_{1.3}$ heterostructures (2018)

S. Jafarpisheh, A. W. Cummings, K. Watanabe, T. Taniguchi, B. Beschoten, and C. Stampfer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): S. Jafarpisheh, A. W. Cummings, K. Watanabe, T. Taniguchi, B. Beschoten, and C. Stampfer The weak intrinsic spin-orbit coupling in graphene can be greatly enhanced by proximity coupling. Here, we report on the proximity-induced spin-orbit coupling in graphene transferred by hexagonal boron nitride (hBN) onto the topological insulator Bi 1.5 Sb 0.5 Te 1.7 Se 1.3 (BSTS) which was grown on a hBN ... [Phys. Rev. B 98, 241402(R)] Published Mon Dec 03, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Device-independent witness of arbitrary-dimensional quantum systems employing binary-outcome measurements (2018)

Mikołaj Czechlewski, Debashis Saha, Armin Tavakoli, and Marcin Pawłowski

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): Mikołaj Czechlewski, Debashis Saha, Armin Tavakoli, and Marcin Pawłowski Device-independent dimension witnesses (DWs) are a remarkable way to test the dimension of a quantum system in a prepare-and-measure scenario imposing minimal assumptions on the internal features of the devices. However, as the dimension increases, the major obstacle in the realization of DWs arises... [Phys. Rev. A 98, 062305] Published Tue Dec 04, 2018

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Duality for open fermion systems: Energy-dependent weak coupling and quantum master equations (2018)

J. Schulenborg, J. Splettstoesser, and M. R. Wegewijs

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): J. Schulenborg, J. Splettstoesser, and M. R. Wegewijs Open fermion systems with energy-independent bilinear coupling to a fermionic environment have been shown to obey a general duality relation [J. Schulenborg et al. , Phys. Rev. B 93 , 081411 (2016) ] which allows for a drastic simplification of time-evolution calculations. In the weak-coupling limit, ... [Phys. Rev. B 98, 235405] Published Tue Dec 04, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Dihedral-angle-corrected registry-dependent interlayer potential for multilayer graphene structures (2018)

Mingjian Wen, Stephen Carr, Shiang Fang, Efthimios Kaxiras, and Ellad B. Tadmor

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): Mingjian Wen, Stephen Carr, Shiang Fang, Efthimios Kaxiras, and Ellad B. Tadmor The structural relaxation of multilayer graphene is essential in describing the interesting electronic properties induced by intentional misalignment of successive layers, including the recently reported superconductivity in twisted bilayer graphene. This is difficult to accomplish without an accura... [Phys. Rev. B 98, 235404] Published Tue Dec 04, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Cavity optomagnonics with magnetic textures: Coupling a magnetic vortex to light (2018)

Jasmin Graf, Hannes Pfeifer, Florian Marquardt, and Silvia Viola Kusminskiy

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Jasmin Graf, Hannes Pfeifer, Florian Marquardt, and Silvia Viola Kusminskiy A unique feature of cavity optomagnonics is the possibility of coherently coupling light to spin excitations on top of magnetic textures. Here, the authors propose a cavity-optomagnonic system with a nonhomogeneous magnetic ground state, namely, a vortex in a magnetic microdisc. Using both analytical and computational methods, they study the cavity-enhanced coupling between optical whispering gallery modes and magnon modes, localized at the vortex. The results, both in terms of value and tunability of the coupling, point to the promise of engineered optomagnonic systems for quantum information platforms. [Phys. Rev. B 98, 241406(R)] Published Wed Dec 05, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Enhanced performance of a quantum-dot-based nanomotor due to Coulomb interactions (2018)

María Florencia Ludovico and Massimo Capone

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): María Florencia Ludovico and Massimo Capone We study the relation between quantum pumping of charge and the work exchanged with the driving potentials in a strongly interacting ac -driven quantum dot. We work in the large-interaction limit and in the adiabatic pumping regime, and we develop a treatment that combines the time-dependent slave-bo... [Phys. Rev. B 98, 235409] Published Wed Dec 05, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Realizing an ultra-wideband backward-wave metamaterial waveguide (2018)

S. S. Seetharaman, B. Tremain, W. L. Barnes, and I. R. Hooper

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): S. S. Seetharaman, B. Tremain, W. L. Barnes, and I. R. Hooper Electroinductive waves have emerged as an attractive solution for designing metamaterials that support backward propagating waves. Stacked metasurfaces etched with complementary split-ring resonators (CSRRs) have also been shown to exhibit a broadband negative dispersion. We demonstrate, through exp... [Phys. Rev. B 98, 235408] Published Wed Dec 05, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Droplet formation in a one-dimensional system of attractive spinless fermions (2018)

Vera V. Vyborova, Oleg Lychkovskiy, and Alexey N. Rubtsov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Vera V. Vyborova, Oleg Lychkovskiy, and Alexey N. Rubtsov A translation invariant one-dimensional system of spinless fermions with a finite-range attraction experiences a quantum phase transition to a phase-separated state. While being a conventional Luttinger liquid for a small interaction strength, spinless fermions form a droplet with the size smaller t... [Phys. Rev. B 98, 235407] Published Wed Dec 05, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Complementary-multiphase quantum search for all numbers of target items (2018)

Tan Li, Wan-Su Bao, He-Liang Huang, Feng-Guang Li, Xiang-Qun Fu, Shuo Zhang, Chu Guo, Yu-Tao Du, Xiang Wang, and Jie Lin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-12-07

Beschreibung: Author(s): Tan Li, Wan-Su Bao, He-Liang Huang, Feng-Guang Li, Xiang-Qun Fu, Shuo Zhang, Chu Guo, Yu-Tao Du, Xiang Wang, and Jie Lin Grover's algorithm achieves a quadratic speedup over classical algorithms, but it is considered necessary to know the value of λ exactly [ Phys. Rev. Lett. 95 , 150501 (2005) ; Phys. Rev. Lett. 113 , 210501 (2014) ], where λ is the fraction of target items in the database. In this paper, we find out that... [Phys. Rev. A 98, 062308] Published Thu Dec 06, 2018

Schlagwort(e): Quantum information

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Enhancing the efficiency of quantum annealing via reinforcement: A path-integral Monte Carlo simulation of the quantum reinforcement algorithm (2018)

A. Ramezanpour

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-12-07

Beschreibung: Author(s): A. Ramezanpour The standard quantum annealing algorithm tries to approach the ground state of a classical system by slowly decreasing the hopping rates of a quantum random walk in the configuration space of the problem, where the on-site energies are provided by the classical energy function. In a quantum reinforc... [Phys. Rev. A 98, 062309] Published Thu Dec 06, 2018

Schlagwort(e): Quantum information

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Relation between width of zero-bias anomaly and Kondo temperature in transport measurements through correlated quantum dots: Effect of asymmetric coupling to the leads (2018)

D. Pérez Daroca, P. Roura-Bas, and A. A. Aligia

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-07

Beschreibung: Author(s): D. Pérez Daroca, P. Roura-Bas, and A. A. Aligia The zero-bias anomaly at low temperatures, originated by the Kondo effect when an electric current flows through a system formed by a spin- 1 / 2 quantum dot and two metallic contacts is theoretically investigated. In particular, we compare the width of this anomaly 2 T NE with that of the Kondo resonanc... [Phys. Rev. B 98, 245406] Published Thu Dec 06, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Two-photon self-Kerr nonlinearities for quantum computing and quantum optics (2018)

Joshua Combes and Daniel J. Brod

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Joshua Combes and Daniel J. Brod The self-Kerr interaction is an optical nonlinearity that produces a phase shift proportional to the square of the number of photons in the field. At present, many proposals use nonlinearities to generate photon-photon interactions. For propagating fields these interactions result in undesirable fea... [Phys. Rev. A 98, 062313] Published Mon Dec 10, 2018

Schlagwort(e): Quantum information

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Simulating arbitrary Gaussian circuits with linear optics (2018)

L. Chakhmakhchyan and N. J. Cerf

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): L. Chakhmakhchyan and N. J. Cerf Linear canonical transformations of bosonic modes correspond to Gaussian unitaries, which comprise passive linear-optical transformations as effected by a multiport passive interferometer and active Bogoliubov transformations as effected by a nonlinear amplification medium. As a consequence of the B... [Phys. Rev. A 98, 062314] Published Mon Dec 10, 2018

Schlagwort(e): Quantum information

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Approximate quantum state reconstruction without a quantum channel (2018)

Zichen Yang, Ze-Yang Fan, Liang-Zhu Mu, and Heng Fan

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-12-12

Beschreibung: Author(s): Zichen Yang, Ze-Yang Fan, Liang-Zhu Mu, and Heng Fan We investigate the optimal quantum state reconstruction from the cloud to many spatially separated users by a measure-broadcast-prepare scheme without the availability of the quantum channel. The quantum state equally distributed from the cloud to an arbitrary number of users is generated at each po... [Phys. Rev. A 98, 062315] Published Tue Dec 11, 2018

Schlagwort(e): Quantum information

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Negative charge enhancement of near-surface nitrogen vacancy centers by multicolor excitation (2018)

I. Meirzada, Y. Hovav, S. A. Wolf, and N. Bar-Gill

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-12

Beschreibung: Author(s): I. Meirzada, Y. Hovav, S. A. Wolf, and N. Bar-Gill Nitrogen vacancy (NV) centers in diamond have been identified over the past few years as promising systems for a variety of applications, ranging from quantum information science to magnetic sensing. This relies on the unique optical and spin properties of the negatively charged NV. Many of these ap... [Phys. Rev. B 98, 245411] Published Tue Dec 11, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Quantum control with measurements and quantum Zeno dynamics (2018)

J. J. W. H. Sørensen, M. Dalgaard, A. H. Kiilerich, K. Mølmer, and J. F. Sherson

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-12-15

Beschreibung: Author(s): J. J. W. H. Sørensen, M. Dalgaard, A. H. Kiilerich, K. Mølmer, and J. F. Sherson We introduce an efficient iterative method to prepare a target state in Hilbert spaces with high dimensionality using a combination of unitary evolution, measurements, and quantum Zeno dynamics. The latter confines the evolution within Zeno subspaces of decreasing size. This gives an exponential spe... [Phys. Rev. A 98, 062317] Published Fri Dec 14, 2018

Schlagwort(e): Quantum information

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Activation of the quantum capacity of Gaussian channels (2018)

Youngrong Lim and Soojoon Lee

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Youngrong Lim and Soojoon Lee Quantum channels with no quantum capacity can be activated by specific kinds of channels. This activation effect might be useful to overcome noise of channels by attaching other channels, which can enhance the capacity of a given channel. We show that such an activation is possible by specific posit... [Phys. Rev. A 98, 012326] Published Wed Jul 25, 2018

Schlagwort(e): Quantum information

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Dual correspondence between classical spin models and quantum Calderbank-Shor-Steane states (2018)

Mohammad Hossein Zarei and Afshin Montakhab

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-01

Beschreibung: Author(s): Mohammad Hossein Zarei and Afshin Montakhab The correspondence between classical spin models and quantum states has attracted much attention in recent years. However, it remains an open problem as to which specific spin model a given (well-known) quantum state maps. Here, we provide such an explicit correspondence for an important class of qu... [Phys. Rev. A 98, 012337] Published Tue Jul 31, 2018

Schlagwort(e): Quantum information

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Quantum walk search on Kronecker graphs (2018)

Thomas G. Wong, Konstantin Wünscher, Joshua Lockhart, and Simone Severini

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-01

Beschreibung: Author(s): Thomas G. Wong, Konstantin Wünscher, Joshua Lockhart, and Simone Severini Kronecker graphs, obtained by repeatedly performing the Kronecker product of the adjacency matrix of an “initiator” graph with itself, have risen in popularity in network science due to their ability to generate complex networks with real-world properties. We explore spatial search by continuous-tim... [Phys. Rev. A 98, 012338] Published Tue Jul 31, 2018

Schlagwort(e): Quantum information

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Adaptive quantum tomography in high dimensions (2018)

L. Pereira, L. Zambrano, J. Cortés-Vega, S. Niklitschek, and A. Delgado

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-01

Beschreibung: Author(s): L. Pereira, L. Zambrano, J. Cortés-Vega, S. Niklitschek, and A. Delgado Standard quantum tomography of a single qudit achieves an infidelity that scales in the worst case as O ( 1 / N ) for a sample of size N . Here, we propose a suitable generalization of the two-stage adaptive quantum tomography for a qubit to the case of a single qudit. This achieves an infidelity of the o... [Phys. Rev. A 98, 012339] Published Tue Jul 31, 2018

Schlagwort(e): Quantum information

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Effect of wire length on quantum coherence in InGaAs wires (2018)

Yuantao Xie and J. J. Heremans

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Yuantao Xie and J. J. Heremans Quantum phase coherence lengths were experimentally measured in nanolithographic wires to investigate the effects of wire length on quantum decoherence, which can be limited by mechanisms such as coupling to an external classical environment. The work demonstrates that device geometry and coupling t... [Phys. Rev. B 98, 035429] Published Tue Jul 24, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Efficient orbital angular momentum transfer between plasmons and free electrons (2018)

Wei Cai, Ori Reinhardt, Ido Kaminer, and F. Javier García de Abajo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Wei Cai, Ori Reinhardt, Ido Kaminer, and F. Javier García de Abajo Free electrons can efficiently absorb or emit plasmons excited in a thin conductor, giving rise to multiple energy peaks in the transmitted electron spectra separated by multiples of the plasmon energy. When the plasmons are chiral, this can also give rise to transfer of orbital angular momentum (OA... [Phys. Rev. B 98, 045424] Published Tue Jul 24, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Spin- and valley-dependent negative magnetoresistance in a ferromagnetic ${\mathrm{MoS}}_{2}$ junction with a quantum well (2018)

Wei-Tao Lu, Hong-Yu Tian, Hong-Mei Liu, Yun-Fang Li, and Wen Li

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Wei-Tao Lu, Hong-Yu Tian, Hong-Mei Liu, Yun-Fang Li, and Wen Li We studied the spin and valley transports and magnetoresistance effect in a MoS 2 junction with a quantum well inserted between the gate voltage and the ferromagnetic MoS 2 , which can apply generally to other transition metal dichalcogenides with the same crystal structure. In the absence of a quantum... [Phys. Rev. B 98, 075405] Published Mon Aug 06, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Strain-engineered Majorana zero energy modes and ${φ}_{0}$ Josephson state in black phosphorus (2018)

Mohammad Alidoust, Morten Willatzen, and Antti-Pekka Jauho

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Mohammad Alidoust, Morten Willatzen, and Antti-Pekka Jauho We develop a theory for strain control of Majorana zero energy modes and the Josephson effect in black phosphorus (BP) devices proximity coupled to a superconductor. Employing realistic values for the band parameters subject to strain, we show that the strain closes the intrinsic band gap of BP; how... [Phys. Rev. B 98, 085414] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Sliding of an electron crystal of finite size on the surface of superfluid $^{4}\mathrm{He}$ confined in a microchannel (2018)

J.-Y. Lin, A. V. Smorodin, A. O. Badrutdinov, and D. Konstantinov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): J.-Y. Lin, A. V. Smorodin, A. O. Badrutdinov, and D. Konstantinov We present a new study of the nonlinear transport of a two-dimensional electron crystal on the surface of liquid helium confined in a 10 − μ m -wide channel in which the effective length of the crystal can be varied from 10 to 215 μ m . At low driving voltages, the moving electron crystal is strongly coupl... [Phys. Rev. B 98, 085412] Published Tue Aug 07, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Enhanced entanglement criterion via symmetric informationally complete measurements (2018)

Jiangwei Shang, Ali Asadian, Huangjun Zhu, and Otfried Gühne

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-11

Beschreibung: Author(s): Jiangwei Shang, Ali Asadian, Huangjun Zhu, and Otfried Gühne The challenges of entanglement detection lead to the development of several entanglement measures and criteria. Here a special type of measurement is used to attest entanglement in a stronger way, i.e. it catches forms that are missed by other criteria and is effective in a single-shot fashion. [Phys. Rev. A 98, 022309] Published Fri Aug 10, 2018

Schlagwort(e): Quantum information

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Dependence of the adsorption height of graphenelike adsorbates on their dimensionality (2018)

S. Weiß, D. Gerbert, A. Stein, A. K. Schenk, X. Yang, C. Brülke, R. Kremring, S. Feldmann, F. C. Bocquet, M. Gille, S. Hecht, M. Sokolowski, P. Tegeder, S. Soubatch, and F. S. Tautz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-11

Beschreibung: Author(s): S. Weiß, D. Gerbert, A. Stein, A. K. Schenk, X. Yang, C. Brülke, R. Kremring, S. Feldmann, F. C. Bocquet, M. Gille, S. Hecht, M. Sokolowski, P. Tegeder, S. Soubatch, and F. S. Tautz Comparing the adsorption heights of various graphene nanoribbons on Cu(111) and Au(111) surfaces to those of graphene and π -conjugated planar organic molecules, we observe that two-dimensional graphene adsorbs much further away from the surface than both one-dimensional graphene nanoribbons and π -co... [Phys. Rev. B 98, 075410] Published Fri Aug 10, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Experimental distillation of bipartite polarization entanglement using polarizing Mach-Zehnder interferometers (2018)

Chithrabhanu Perumangatt, Tang Zong Sheng, and Alexander Ling

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Chithrabhanu Perumangatt, Tang Zong Sheng, and Alexander Ling Entanglement distillation is the process of concentrating entanglement from a given quantum state. We present a technique for distillation of bipartite polarization entanglement using interferometry. This technique can be optimized to extract maximal entanglement from any pure or mixed entangled sta... [Phys. Rev. A 98, 022313] Published Mon Aug 13, 2018

Schlagwort(e): Quantum information

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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Thermoelectric properties of a quantum dot coupled to magnetic leads by Rashba spin-orbit interaction (2018)

Łukasz Karwacki and Józef Barnaś

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Łukasz Karwacki and Józef Barnaś We consider a single-level quantum dot coupled to two leads which are ferromagnetic in general. Apart from tunneling processes conserving electron spin, we also include processes associated with spin flip of tunneling electrons, which appear due to Rashba spin-orbit coupling. Charge and heat current... [Phys. Rev. B 98, 075413] Published Mon Aug 13, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Temperature- and frequency-dependent optical and transport conductivities in doped buckled honeycomb lattices (2018)

Andrii Iurov, Godfrey Gumbs, and Danhong Huang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Andrii Iurov, Godfrey Gumbs, and Danhong Huang Thermal and dynamical properties of optical and transport conductivities in doped buckled honeycomb lattices are studied for various doping densities and band gaps. At finite temperatures, a thermally convoluted polarization function is calculated by employing analytically derived temperature-depend... [Phys. Rev. B 98, 075414] Published Mon Aug 13, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

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