Results 81 to 90 of about 1,354,711 (291)
General bounds for quantum discord and discord distance [PDF]
Quantum Information Processing, 2014 For any bipartite state, how strongly can one subsystem be quantum correlated with another? Using the Koashi-Winter relation, we study the upper bound of purified quantum discord, which is given by the sum of the von Neumann entropy of the unmeasured subsystem and the entanglement of formation shared between the unmeasured subsystem with the ...
Liu, Feng +4 more
openaire +3 more sources
Quantum correlations in optomechanical system in the presence of optical feedback
Physics Open, 2022 In this paper, we investigate the dynamics of quantum correlations for the continuous-variable bipartite optomechanical system in the presence of homodyne mediated quantum feedback.
Sitotaw Eshete
doaj +1 more source
Quantum correlation in three-qubit Heisenberg model with Dzyaloshinskii-Moriya interaction
, 2011 We investigate the pairwise thermal quantum discord in a three-qubit XXZ model with Dzyaloshinskii-Moriya (DM) interaction. We find that the DM interaction can increase quantum discord to a fixed value in the anti- ferromagnetic system, but decreases ...
A.K. Pal +10 more
core +1 more source
Quantum discord and Maxwell’s demons [PDF]
Physical Review A, 2003 Quantum discord was proposed as an information theoretic measure of the ``quantumness'' of correlations. I show that discord determines the difference between the efficiency of quantum and classical Maxwell's demons in extracting work from collections of correlated quantum systems.
openaire +3 more sources
Topology of quantum discord [PDF]
Journal of Physics A: Mathematical and Theoretical, 2017 Revised version submitted to Physical Review ...
Nguyen, Nga T. T., Joynt, Robert
openaire +2 more sources
Correlations in quantum states and the local creation of quantum discord
, 2012 Quantum discord is usually referred to as a measure for quantum correlations. In the search of the fundamental resource to gain a quantum advantage in quantum information applications, quantum discord is considered a promising candidate. In this paper we
Breuer, Heinz-Peter +3 more
core +1 more source
Deterministic hBN Bubbles as a Versatile Platform for Studies on Single‐Photon Emitters
Advanced Functional Materials, EarlyView.Single‐photon emitters (SPEs) in hBN are promising for quantum technologies; however, in exfoliated samples their activation is required, limiting reproducibility of previous studies. This work introduces a large‐area MOVPE‐grown hBN platform that hosts SPEs without prior activation.
Piotr Tatarczak +8 more
wiley +1 more source
Correlations in Two-Qubit Systems under Non-Dissipative Decoherence
Axioms, 2020 We built a new set of suitable measures of correlations for bipartite quantum states based upon a recently introduced theoretical framework [Bussandri et al. in Quantum Inf. Proc. 18:57, 2019].
Diego G. Bussandri +3 more
doaj +1 more source
Geometric picture of quantum discord for two-qubit quantum states
, 2011 Among various definitions of quantum correlations, quantum discord has attracted considerable attention. To find analytical expression of quantum discord is an intractable task.
Chunxiao Sun +7 more
core +1 more source
Entanglement and quantum discord in optically coupled coherent Ising machines
Physical Review A, 2020 We present analytical and numerical simulation results for squeezing, entanglement, and quantum discord in a dissipatively coupled coherent Ising machine (CIM).
Y. Inui, Y. Yamamoto
semanticscholar +1 more source