Chinese Journal of Quantum Electronics, Volume. 28, Issue 4, 446(2011)

Geometric measurement of quantum correlation for a kind of X-state

Wei-jun GUI1、* and Min-bin JIANG2
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  • 1[in Chinese]
  • 2[in Chinese]
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    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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    Paper Information

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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)

    DOI:10.3969/j.issn.1007-5461.2011.04.010

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