J4 ›› 2011, Vol. 28 ›› Issue (4): 446-450.

• Quantum Optics • Previous Articles     Next Articles

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

GUI Weijun1,JIANG Minbin2   

  1. 1 Department of Science, Nanchang Institute of Technology, Nanchang 330099, China; 2 Department of Computational Science and Technology, Nanchang Institute of Technology, Nanchang 330099, China
  • Received:2011-01-10 Revised:2011-03-02 Published:2011-07-28 Online:2011-07-06

Abstract:

Quantum discord(QD) can be used to characterize quantum correlation of a quantum system. Based on geometric measure 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 through using graphical method, its concluded that GMQD exhibit more robust than concurrence when the quantum system is exposed to environment.

Key words: quantum optics, X-state, quantum correlation, geometric measurement

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