Results 41 to 50 of about 577,492 (310)
Tripartite entanglement and quantum correlation
Journal of High Energy Physics, 2021 We provide an analytical tripartite-study from the generalized R-matrix. It provides the upper bound of the maximum violation of Mermin’s inequality. For a generic 2-qubit pure state, the concurrence or R-matrix characterizes the maximum violation of ...
Xingyu Guo, Chen-Te Ma
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Temperature Correlations of Quantum Spins [PDF]
Physical Review Letters, 1993 We consider isotropic XY model in the transverse magnetic field on the one dimensional lattice. Another name of the model in Heisenberg XXO model of spin 1/2.We solved long standing problem of evaluation of temperature correlations. We first represent correlation function in the model, by means of completely integrable differential equation.
Nikita Andreevich Slavnov +3 more
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Quantum correlations with no causal order [PDF]
Nature Communications, 2012 The idea that events obey a definite causal order is deeply rooted in our understanding of the world and at the basis of the very notion of time. But where does causal order come from, and is it a necessary property of nature? We address these questions from the standpoint of quantum mechanics in a new framework for multipartite correlations which does
Ognyan Oreshkov +3 more
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Entropy, 2020 Quantum correlations of higher-dimensional systems are an important content of quantum information theory and quantum information application. The quantification of quantum correlation of high-dimensional quantum systems is crucial, but difficult.
Lianzhen Cao +5 more
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Fully nonlocal quantum correlations [PDF]
Physical Review A, 2012 Quantum mechanics is a nonlocal theory, but not as nonlocal as the no-signalling principle allows. However, there exist quantum correlations that exhibit maximal nonlocality: they are as nonlocal as any non-signalling correlations and thus have a local content, quantified by the fraction $p_L$ of events admitting a local description, equal to zero ...
Andrea Chiuri +7 more
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Fluctuation, time-correlation function and geometric Phase [PDF]
, 1998 We establish a fluctuation-correlation theorem by relating the quantum fluctuations in the generator of the parameter change to the time integral of the quantum correlation function between the projection operator and force operator of the ``fast ...
A. Mostafazadeh +26 more
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Converting Coherence to Quantum Correlations [PDF]
Physical Review Letters, 2016 Recent results in quantum information theory characterize quantum coherence in the context of resource theories. Here we study the relation between quantum coherence and quantum discord, a kind of quantum correlation which appears even in non-entangled states.
Jiajun Ma +5 more
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Randomness-based macroscopic Franson-type nonlocal correlation
Scientific Reports, 2022 Franson-type nonlocal correlation is related to Bell inequality violation tests and has been applied for quantum key distributions based on time bin methods.
Byoung S. Ham
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Quantum correlations for the metric [PDF]
Physical Review D, 2017 We discuss the correlation function for the metric for homogeneous and isotropic cosmologies. The exact propagator equation determines the correlation function as the inverse of the second functional derivative of the quantum effective action. This formulation relates the metric correlation function employed in quantum gravity computations to ...
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Verifying the Quantumness of Bipartite Correlations [PDF]
Physical Review Letters, 2016 Entanglement is at the heart of most quantum information tasks, and therefore considerable effort has been made to find methods of deciding the entanglement content of a given bipartite quantum state. Here, we prove a fundamental limitation to deciding if an unknown state is entangled or not: we show that any quantum measurement which can answer this ...
Carmeli, Claudio +4 more
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