Chinese Journal of Quantum Electronics, Volume. 28, Issue 4, 446(2011)
Geometric measurement of quantum correlation for a kind of X-state
Quantum discord(QD) can be used to characterize quantum correlation of a quantum system. Based on geometric measurement of QD(GMQD), quantum correlation of the single-parameter X- state was calculated, and the results for the case were also given under three different quantum channels. For the amplitude-damping channel, by comparing concurrence and GMQD of the X-state mentioned above using graphical method, it’s concluded that GMQD exhibits more robust than concurrence when the quantum system is exposed to environment.
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GUI Wei-jun, JIANG Min-bin. Geometric measurement of quantum correlation for a kind of X-state[J]. Chinese Journal of Quantum Electronics, 2011, 28(4): 446
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Received: Jan. 10, 2011
Accepted: --
Published Online: Jul. 29, 2011
The Author Email: Wei-jun GUI (gwj@mail.ustc.edu.cn)