Results 21 to 30 of about 13,301 (232)
Quantum correlation in a nano-electro-optomechanical system enhanced by an optical parametric amplifier and Coulomb-type interaction [PDF]
Scientific Reports, 2023 In this paper, we investigated the quantum correlation of nano-electro-optomechanical system enhanced by an optical parametric amplifier (OPA) and Coulomb-type interaction. In particular, we consider a hybrid system consisting of a cavity and two charged
Habtamu Dagnaw Mekonnen +3 more
doaj +2 more sources
Homodyne estimation of Gaussian quantum discord [PDF]
Physical Review Letters, 2012 We address the experimental estimation of Gaussian quantum discord for two-mode squeezed thermal state, and demonstrate a measurement scheme based on a pair of homodyne detectors assisted by Bayesian analysis which provides nearly optimal estimation for ...
C. W. Helstrom +7 more
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A pedagogical overview of quantum discord [PDF]
Open Systems & Information Dynamics, 2013 Recent measures of nonclassical correlations are motivated by different notions of classicality and operational means. Quantum discord has received a great deal of attention in studies involving quantum computation, metrology, dynamics, many-body physics,
Modi, Kavan
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Quantum coherence and geometric quantum discord [PDF]
Physics Reports, 2018 Quantum coherence and quantum correlations are of fundamental and practical significance for the development of quantum mechanics.They are also cornerstones of quantum computation and quantum communication theory. Searching physically meaningful and mathematically rigorous quantifiers of them are long-standing concerns of the community of quantum ...
Ming-Liang Hu +5 more
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Applying Gaussian quantum discord to quantum key distribution
Science Bulletin, 2014 In this paper, we theoretically prove that the Gaussian quantum discord state of optical field can be used to complete continuous variable (CV) quantum key distribution (QKD). The calculation shows that secret key can be distilled with a Gaussian quantum
Su, Xiaolong
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Efficient Characterization of Quantum Evolutions via a Recommender System [PDF]
Quantum, 2021 We demonstrate characterizing quantum evolutions via matrix factorization algorithm, a particular type of the recommender system (RS). A system undergoing a quantum evolution can be characterized in several ways.
Priya Batra +2 more
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Sharma–Mittal quantum discord [PDF]
Quantum Information Processing, 2019 We demonstrate a generalization of quantum discord using a generalized definition of von-Neumann entropy, which is Sharma-Mittal entropy; and the new definition of discord is called Sharma-Mittal quantum discord. Its analytic expressions are worked out for two qubit quantum states as well as Werner, isotropic, and pointer states as special cases. The R{
Souma Mazumdar +2 more
openaire +3 more sources
Monogamy properties of quantum correlations in neutrino oscillations
European Physical Journal C: Particles and Fields, 2023 The monogamy relation of quantum states has limited the shareability properties of quantum resources in multiparty quantum systems. It plays a vital role in information distribution and transformation over many sites in quantum communications.
Guang-Jie Wang +4 more
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QUANTUM DISCORD AND QUANTUM COMPUTING — AN APPRAISAL [PDF]
International Journal of Quantum Information, 2011 We discuss models of computing that are beyond classical. The primary motivation is to unearth the cause of non-classical advantages in computation. Completeness results from computational complexity theory lead to the identification of very disparate problems, and offer a kaleidoscopic view into the realm of quantum enhancements in computation ...
Datta, A, Shaji, A
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Discording Power of Quantum Evolutions [PDF]
Physical Review Letters, 2013 accepted for publication in Physical Review ...
Galve F +3 more
openaire +6 more sources