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Witnessing Entanglement and Quantum Correlations in Condensed Matter: A Review [PDF]
Advanced Quantum TechnologiesThe detection and certification of entanglement and quantum correlations in materials is of fundamental and far‐reaching importance, and has seen significant recent progress.
P. Laurell +3 more
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ARE QUANTUM CORRELATIONS GENUINELY QUANTUM? [PDF]
International Journal of Modern Physics B, 2012 It is shown that the probabilities for the spin singlet can be reproduced through classical resources, with no communication between the distant parties, by using merely shared (pseudo-)randomness. If the parties are conscious beings aware of both the hidden-variables and the random mechanism, then one has a conspiracy.
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Stronger-Than-Quantum Correlations [PDF]
Foundations of Physics, 1998 After an elementary derivation of Bell's inequality, several forms of expectation functions for two-valued observables are discussed. Special emphasis is given to hypothetical stronger-than quantum expectation functions which give rise to a maximal violation of Bell's inequality.
Krenn, Kurt, Svozil, Karl
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Correlated Markov Quantum Walks [PDF]
Annales Henri Poincaré, 2012 We consider the discrete time unitary dynamics given by a quantum walk on $\Z^d$ performed by a particle with internal degree of freedom, called coin state, according to the following iterated rule: a unitary update of the coin state takes place, followed by a shift on the lattice, conditioned on the coin state of the particle.
Hamza, Eman, Joye, Alain
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Bounding the Sets of Classical and Quantum Correlations in Networks. [PDF]
Physical Review Letters, 2019 We present a method that allows the study of classical and quantum correlations in networks with causally independent parties, such as the scenario underlying entanglement swapping.
Alejandro Pozas-Kerstjens +6 more
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Out-of-time-order correlations and quantum chaos [PDF]
Scholarpedia, 2022 Quantum Chaos has originally emerged as the field which studies how the properties of classical chaotic systems arise in their quantum counterparts. The growing interest in quantum many-body systems, with no obvious classical meaning has led to consider ...
Ignacio Garc'ia-Mata +2 more
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Universal optimal quantum correlator [PDF]
International Journal of Quantum Information, 2014 Recently, a novel operational strategy to access quantum correlation functions of the form Tr[AρB] was provided in [F. Buscemi, M. Dall'Arno, M. Ozawa and V. Vedral, arXiv:1312.4240]. Here we propose a realization scheme, that we call partial expectation values, implementing such strategy in terms of a unitary interaction with an ancillary system ...
Buscemi, Francesco +3 more
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Reservoir-Mediated Quantum Correlations in Non-Hermitian Optical System. [PDF]
Physical Review Letters, 2019 Recent advances in non-Hermitian physical systems have led to numerous novel optical phenomena and applications. Such systems typically involve gain and loss associated with dissipative coupling to the environment, hence interesting quantum phenomena are
Wanxia Cao +5 more
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THE SET OF QUANTUM CORRELATIONS IS NOT CLOSED [PDF]
Forum of Mathematics, Pi, 2017 We construct a linear system nonlocal game which can be played perfectly using a limit of finite-dimensional quantum strategies, but which cannot be played perfectly on any finite-dimensional Hilbert space, or even with any tensor-product strategy.
William Slofstra
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Security of quantum key distribution with intensity correlations [PDF]
Quantum, 2021 The decoy-state method in quantum key distribution (QKD) is a popular technique to approximately achieve the performance of ideal single-photon sources by means of simpler and practical laser sources.
Víctor Zapatero +3 more
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