Measure of nonclassical correlation in coherence-vector representation

Tao Zhou, Jingxin Cui, and Gui Lu Long

Phys. Rev. A 84, 062105 – Published 5 December 2011; Erratum Phys. Rev. A 85, 029904 (2012)

Abstract

We consider the coherence-vector representation of a bipartite state and obtain a necessary and sufficient condition for a zero-discord state. Based on this, a measure of quantum, classical, and total amount of correlations in bipartite states is proposed in this representation. Analytical expressions for this measure are available for any bipartite states. Our measure of nonclassical correlation coincides with the geometric measure of quantum discord for some particular states.

Received 13 July 2011

DOI:https://doi.org/10.1103/PhysRevA.84.062105

Erratum

Erratum: Measure of nonclassical correlation in coherence-vector representation [Phys. Rev. A 84, 062105 (2011)]

Tao Zhou, Jingxin Cui, and Gui Lu Long

Phys. Rev. A 85, 029904 (2012)

Authors & Affiliations

Tao Zhou¹, Jingxin Cui¹, and Gui Lu Long^1,2,*

¹State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics, Tsinghua University, 100084 Beijing, China
²Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, 100084 Beijing, China

^*gllong@tsinghua.edu.cn

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Issue

Vol. 84, Iss. 6 — December 2011

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