Results 11 to 20 of about 1,306,706 (295)
Quantum discord with weak measurements [PDF]
Annals of Physics, 2014 Latex, 5 pages, 2 Figs, Monotonicity of the super discord with the measurement strength is included.
Uttam Singh, Arun Kumar Pati
core +6 more sources
Diagonal quantum discord [PDF]
Journal of Physics A: Mathematical and Theoretical, 2019 15 pages, 3 figures; published ...
Zi-Wen Liu, Ryuji Takagi, Seth Lloyd
openaire +5 more sources
Quantum discord as a resource for quantum cryptography. [PDF]
Sci Rep, 2014 Quantum discord is the minimal bipartite resource which is needed for a secure quantum key distribution, being a cryptographic primitive equivalent to non-orthogonality. Its role becomes crucial in device-dependent quantum cryptography, where the presence of preparation and detection noise (inaccessible to all parties) may be so strong to prevent the ...
Pirandola S.
europepmc +5 more sources
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
Entanglement and quantum discord in the cavity QED models [PDF]
HeliyonWe investigate the quantum correlation between light and matter in bipartite quantum systems, drawing on the Jaynes–Cummings model and the Tavis–Cummings model, which are well-established in cavity quantum electrodynamics.
Hui-hui Miao, Wanshun Li
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Squeezing of Primordial Gravitational Waves as Quantum Discord [PDF]
Universe, 2020 We investigate the squeezing of primordial gravitational waves (PGWs) in terms of quantum discord. We construct a classical state of PGWs without quantum discord and compare it with the Bunch−Davies vacuum.
Akira Matsumura, Yasusada Nambu
doaj +2 more sources
Multipartite Generalization of Quantum Discord. [PDF]
Physical Review Letters, 2019 A generalization of quantum discord to multipartite systems is proposed. A key feature of our formulation is its consistency with the conventional definition of discord in bipartite systems.
C. Radhakrishnan +2 more
semanticscholar +5 more sources
Study on Non-Commutativity Measure of Quantum Discord
Mathematics, 2019 In this paper, we are concerned with the non-commutativity measure of quantum discord. We first present an explicit expression of the non-commutativity measure of quantum discord in the two-qubit case.
Jin Liang, Chengwei Zhang
doaj +2 more sources
A new entropic quantum correlation measure for adversarial systems [PDF]
Scientific Reports, 2023 Quantum correlation often refers to correlations exhibited by two or more local subsystems under a suitable measurement. These correlations are beyond the framework of classical statistics and the associated classical probability distribution.
Biveen Shajilal +3 more
doaj +2 more sources
Operational interpretations of quantum discord [PDF]
Physical Review A, 2011 Quantum discord quantifies non-classical correlations going beyond the standard classification of quantum states into entangled and unentangled ones. Although it has received considerable attention, it still lacks any precise interpretation in terms of some protocol in which quantum features are relevant.
Daniel Cavalcanti +5 more
openalex +7 more sources