Results 1 to 10 of about 440,056 (266)
Diagonal quantum discord [PDF]
J. Phys. A: Math. Theor. 52, 135301 (2019), 2017 Quantum discord measures quantum correlation by comparing the quantum mutual information with the maximal amount of mutual information accessible to a quantum measurement. This paper analyzes the properties of diagonal discord, a simplified version of discord that compares quantum mutual information with the mutual information revealed by a measurement
Liu, Zi-Wen, Lloyd, Seth, Takagi, Ryuji
arxiv +7 more sources
Experimental Investigation of the Evolution of Gaussian Quantum Discord in an Open System [PDF]
Phys. Rev. Lett. 109, 030402 (2012), 2012 Gaussian quantum discord is a measure of quantum correlations in Gaussian systems. Using Gaussian discord we quantify the quantum correlations of a bipartite entangled state and a separable two-mode mixture of coherent states. We experimentally analyze the effect of noise addition and dissipation on Gaussian discord and show that the former noise ...
Lars S. Madsen +3 more
arxiv +8 more sources
Quantum discord with weak measurements [PDF]
Annals of Physics, 2014 Weak measurements cause small change to quantum states, thereby opening up the possibility of new ways of manipulating and controlling quantum systems. We ask, can weak measurements reveal more quantum correlation in a composite quantum state?
Uttam Singh, Arun Kumar Pati
core +6 more sources
The tripartite quantum-memory-assisted entropic uncertainty relation and upper bound on shareability of quantum discord [PDF]
Scientific Reports, 2022 Quantum discord and quantum uncertainty are two important features of the quantum world. In this work, the relation between entropic uncertainty relation and the shareability of quantum discord is studied.
Hazhir Dolatkhah +2 more
doaj +2 more sources
Necessary and Sufficient Condition for Nonzero Quantum Discord [PDF]
, 2010 Quantum discord characterizes "non-classicality" of correlations in quantum mechanics. It has been proposed as the key resource present in certain quantum communication tasks and quantum computational models without containing much entanglement.
Borivoje Dakić +2 more
openalex +3 more sources
Analysis of Quantum Correlations Obtained Using Local Optimal Universal Asymmetric Cloners [PDF]
Entropy, 2022 We apply the local optimal universal asymmetric cloning machine on an initially pure entangled state of two qubits. As output, we obtain two final states which present quantum correlations.
Cătălina Cîrneci, Iulia Ghiu
doaj +2 more sources
Quantum Inf Process (2018) 17: 194, 2018 Originally introduced as the difference between two possible forms of quantum mutual information, quantum discord has posteriorly been shown to admit a formulation according to which it measures a distance between the state under scrutiny and the closest projectively measured (non-discordant) state.
P. R. Dieguez, R. M. Angelo
arxiv +5 more sources
Quantum Discord: A Measure of the Quantumness of Correlations [PDF]
Physical Review Letters, 2001 Two classically identical expressions for the mutual information generally differ when the systems involved are quantum. This difference defines the quantum discord. It can be used as a measure of the quantumness of correlations. Separability of the density matrix describing a pair of systems does not guarantee vanishing of the discord, thus showing ...
H Ollivier, Wojciech H. Zurek
openalex +4 more sources
Quantum Discord, Thermal Discord, and Entropy Generation in the Minimum Error Discrimination Strategy [PDF]
Entropy, 2019 We study the classical and quantum correlations in the minimum error discrimination (ME) of two non-orthogonal pure quantum states. In particular, we consider quantum discord, thermal discord and entropy generation.
Omar Jiménez +3 more
doaj +2 more sources
The freezing Rènyi quantum discord. [PDF]
Sci Rep, 2019 AbstractAs a universal quantum character of quantum correlation, the freezing phenomenon is researched by geometry and quantum discord methods, respectively. In this paper, the properties of Rènyi discord is studied for two independent Dimer System coupled to two correlated Fermi-spin environments under the non-Markovian condition.
Li XY +5 more
europepmc +6 more sources