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Measuring Bipartite Quantum Correlations of an Unknown State (2013)

I. A. Silva, D. Girolami, R. Auccaise, R. S. Sarthour, I. S. Oliveira, T. J. Bonagamba, E. R. de; Azevedo, D. O. Soares-Pinto, and G. Adesso

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2013-04-04

Beschreibung: Author(s): I. A. Silva, D. Girolami, R. Auccaise, R. S. Sarthour, I. S. Oliveira, T. J. Bonagamba, E. R. deAzevedo, D. O. Soares-Pinto, and G. Adesso We report the experimental measurement of bipartite quantum correlations of an unknown two-qubit state. Using a liquid state Nuclear Magnetic Resonance setup and employing geometric discord, we evaluate the quantum correlations of a state without resorting to prior knowledge of its density matrix. T... [Phys. Rev. Lett. 110, 140501] Published Wed Apr 03, 2013

Schlagwort(e): General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Print ISSN: 0031-9007

Digitale ISSN: 1079-7114

Thema: Physik

Publiziert von American Physical Society (APS)

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Experimentally Witnessing the Quantumness of Correlations (2011)

R. Auccaise, J. Maziero, L. C. Céleri, D. O. Soares-Pinto, E. R. de; Azevedo, T. J. Bonagamba, R. S. Sarthour, I. S. Oliveira, and R. M. Serra

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2011-08-10

Beschreibung: Author(s): R. Auccaise, J. Maziero, L. C. Céleri, D. O. Soares-Pinto, E. R. deAzevedo, T. J. Bonagamba, R. S. Sarthour, I. S. Oliveira, and R. M. Serra The quantification of quantum correlations (other than entanglement) usually entails labored numerical optimization procedures also demanding quantum state tomographic methods. Thus it is interesting to have a laboratory friendly witness for the nature of correlations. In this Letter we report a dir... [Phys. Rev. Lett. 107, 070501] Published Tue Aug 09, 2011

Schlagwort(e): General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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Thema: Physik

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Environment-Induced Sudden Transition in Quantum Discord Dynamics (2011)

R. Auccaise, L. C. Céleri, D. O. Soares-Pinto, E. R. de; Azevedo, J. Maziero, A. M. Souza, T. J. Bonagamba, R. S. Sarthour, I. S. Oliveira, and R. M. Serra

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2011-10-01

Beschreibung: Author(s): R. Auccaise, L. C. Céleri, D. O. Soares-Pinto, E. R. deAzevedo, J. Maziero, A. M. Souza, T. J. Bonagamba, R. S. Sarthour, I. S. Oliveira, and R. M. Serra [Phys. Rev. Lett. 107, 140403] Published Fri Sep 30, 2011

Schlagwort(e): General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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Digitale ISSN: 1079-7114

Thema: Physik

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Irreversible Work and Inner Friction in Quantum Thermodynamic Processes (2015)

F. Plastina, A. Alecce, T. J. G. Apollaro, G. Falcone, G. Francica, F. Galve, N. Lo Gullo, and R. Zambrini

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-01-01

Beschreibung: Author(s): F. Plastina, A. Alecce, T. J. G. Apollaro, G. Falcone, G. Francica, F. Galve, N. Lo Gullo, and R. Zambrini We discuss the thermodynamics of closed quantum systems driven out of equilibrium by a change in a control parameter and undergoing a unitary process. We compare the work actually done on the system with the one that would be performed along ideal adiabatic and isothermal transformations. The compar... [Phys. Rev. Lett. 113, 260601] Published Wed Dec 31, 2014

Schlagwort(e): General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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Thema: Physik

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Capturing Exponential Variance Using Polynomial Resources: Applying Tensor Networks to Nonequilibrium Stochastic Processes (2015)

T. H. Johnson, T. J. Elliott, S. R. Clark, and D. Jaksch

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2015-03-06

Beschreibung: Author(s): T. H. Johnson, T. J. Elliott, S. R. Clark, and D. Jaksch Estimating the expected value of an observable appearing in a nonequilibrium stochastic process usually involves sampling. If the observable’s variance is high, many samples are required. In contrast, we show that performing the same task without sampling, using tensor network compression, efficient... [Phys. Rev. Lett. 114, 090602] Published Thu Mar 05, 2015

Schlagwort(e): General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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Optimal Control of Open Quantum Systems: Cooperative Effects of Driving and Dissipation (2011)

R. Schmidt, A. Negretti, J. Ankerhold, T. Calarco, and J. T. Stockburger

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2011-09-22

Beschreibung: Author(s): R. Schmidt, A. Negretti, J. Ankerhold, T. Calarco, and J. T. Stockburger We investigate the optimal control of open quantum systems, in particular, the mutual influence of driving and dissipation. A stochastic approach to open-system control is developed, using a generalized version of Krotov’s iterative algorithm, with no need for Markovian or rotating-wave approximatio... [Phys. Rev. Lett. 107, 130404] Published Wed Sep 21, 2011

Schlagwort(e): General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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Thema: Physik

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Evolution of the Normal State of a Strongly Interacting Fermi Gas from a Pseudogap Phase to a Molecular Bose Gas (2011)

A. Perali, F. Palestini, P. Pieri, G. C. Strinati, J. T. Stewart, J. P. Gaebler, T. E. Drake, and D. S. Jin

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2011-02-11

Beschreibung: Author(s): A. Perali, F. Palestini, P. Pieri, G. C. Strinati, J. T. Stewart, J. P. Gaebler, T. E. Drake, and D. S. Jin Wave-vector resolved radio frequency spectroscopy data for an ultracold trapped Fermi gas are reported for several couplings at T_{c} , and extensively analyzed in terms of a pairing-fluctuation theory. We map the evolution of a strongly interacting Fermi gas from the pseudogap phase into a fully ga... [Phys. Rev. Lett. 106, 060402] Published Thu Feb 10, 2011

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3D Loop Models and the CP^{n-1} Sigma Model (2011)

Adam Nahum, J. T. Chalker, P. Serna, M. Ortuño, and A. M. Somoza

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2011-09-09

Beschreibung: Author(s): Adam Nahum, J. T. Chalker, P. Serna, M. Ortuño, and A. M. Somoza Many statistical mechanics problems can be framed in terms of random curves; we consider a class of three-dimensional loop models that are prototypes for such ensembles. The models show transitions between phases with infinite loops and short-loop phases. We map them to CP n -1 sigma models, where n i... [Phys. Rev. Lett. 107, 110601] Published Thu Sep 08, 2011

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Length Distributions in Loop Soups (2013)

Adam Nahum, J. T. Chalker, P. Serna, M. Ortuño, and A. M. Somoza

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2013-09-05

Beschreibung: Author(s): Adam Nahum, J. T. Chalker, P. Serna, M. Ortuño, and A. M. Somoza Statistical lattice ensembles of loops in three or more dimensions typically have phases in which the longest loops fill a finite fraction of the system. In such phases it is natural to ask about the distribution of loop lengths. We show how to calculate moments of these distributions using C P n -1 or... [Phys. Rev. Lett. 111, 100601] Published Wed Sep 04, 2013

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Spectral Statistics in Spatially Extended Chaotic Quantum Many-Body Systems (2018)

Amos Chan, Andrea De Luca, and J. T. Chalker

American Physical Society (APS)

In: Physical Review Letters

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Amos Chan, Andrea De Luca, and J. T. Chalker We study spectral statistics in spatially extended chaotic quantum many-body systems, using simple lattice Floquet models without time-reversal symmetry. Computing the spectral form factor K ( t ) analytically and numerically, we show that it follows random matrix theory (RMT) at times longer than a ma... [Phys. Rev. Lett. 121, 060601] Published Tue Aug 07, 2018

Schlagwort(e): General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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