Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

The European Physical Journal Plus

Relations between the quantum correlation entropy and quantum discord for X-states in multipartite systems

Xiang Qin Zhou, Zhu‐Jun Zheng

Published May 1, 2022• 13 citations
Publisher
DOI
10.1140/epjp/s13360-022-02838-w

Related papers

Global Quantum Discord derived from Tsallis entropy in Multipartite systems

이경진

•Jan 1, 2013•0 citations

Global quantum discord in multipartite systems

C. C. Rulli, M. S. Sarandy

We propose a global measure for quantum correlations in multipartite systems, which is obtained by suitably recasting the quantum discord in terms of relative entropy and local von Neumann measurements. The measure is symmetric with respect to subsystem exchange and is shown to be nonnegative for an arbitrary state. As an illustration, we consider tripartite correlations in the Werner-GHZ (Greenberger-Horne-Zeilinger) state and multipartite correlations at quantum criticality. In particular, in contrast with the pairwise quantum discord, we show that the global quantum discord is able to characterize the infinite-order quantum phase transition in the Ashkin-Teller spin chain.

arXiv:1105.2548•Physical Review A•Oct 11, 2011•311 citations

Comparison of quantum discord and relative entropy in some bipartite quantum systems

M. Mahdian, Mohammad B. Arjmandi

arXiv:1308.0901•Quantum Information Processing•Jan 25, 2016•5 citations

QUANTUM DISCORD FOR MULTIPARTITE COHERENT STATES INTERPOLATING BETWEEN WERNER AND GREENBERGER–HORNE–ZEILINGER STATES

Mohammed Daoud A, R. Ahl Laamara

The quantum discord is used as measure of quantum correlations for two families of multipartite coherent states. The first family interpolates between generalized GHZ states and generalized Werner states. The second one is an interpolation between generalized GHZ and the ground state of the multipartite quantum system. Two inequivalent ways to split the system in a pair of qubits are introduced. The explicit expressions of quantum quantum discord in multipartite coherent states are derived. Its evaluation uses the Koashi–Winter relation in optimizing the conditional entropy. The temporal evolution of quantum correlations (quantum discord and entanglement) is also discussed.

arXiv:1210.8313•International Journal of Quantum Information•Aug 1, 2012•22 citations

Quantum discord through the generalized entropy in bipartite quantum states

Xi-Wen Hou, Zhipeng Huang, Su Chen

The European Physical Journal D•Apr 1, 2014•9 citations

Comment on Quantum discord through the generalized entropy in bipartite quantum states

Guido Bellomo, Angel Ricardo Plastino, Majtey, Ana Paula +1 more

•Nov 1, 2014•6 citations
We propose a global measure for quantum correlations in multipartite systems, which is obtained by suitably recasting the quantum discord in terms of relative entropy and local von Neumann measurements. The measure is symmetric with respect to subsystem exchange and is shown to be nonnegative for an arbitrary state. As an illustration, we consider tripartite correlations in the Werner-GHZ (Greenberger-Horne-Zeilinger) state and multipartite correlations at quantum criticality. In particular, in contrast with the pairwise quantum discord, we show that the global quantum discord is able to characterize the infinite-order quantum phase transition in the Ashkin-Teller spin chain.
The quantum discord is used as measure of quantum correlations for two families of multipartite coherent states. The first family interpolates between generalized GHZ states and generalized Werner states. The second one is an interpolation between generalized GHZ and the ground state of the multipartite quantum system. Two inequivalent ways to split the system in a pair of qubits are introduced. The explicit expressions of quantum quantum discord in multipartite coherent states are derived. Its evaluation uses the Koashi–Winter relation in optimizing the conditional entropy. The temporal evolution of quantum correlations (quantum discord and entanglement) is also discussed.