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Comparison of entanglement decay between Bell-like states under different environmental models

Han Wei Cui Wen-Kai Zhang Ying-Jie Xia Yun-Jie

Comparison of entanglement decay between Bell-like states under different environmental models

Han Wei, Cui Wen-Kai, Zhang Ying-Jie, Xia Yun-Jie
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  • Received Date:  19 April 2012
  • Accepted Date:  29 June 2012
  • Published Online:  05 December 2012

Comparison of entanglement decay between Bell-like states under different environmental models

  • 1. Department of Physics, Qufu Normal University, Qufu 273165, China;
  • 2. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China
Fund Project:  Project supported by the Key Program of National Science Foundation of China (Grant No.10534030), and the Young Teacher Research Funds from Qufu Normal University, China (Grant No. XJ201013).

Abstract: Establishing three different environment models (i.e., single reservoir model, common reservoir model and independent reservoir model), we investigate the evolutional characteristic of the entangled system initially in Bell-like state by the pseudomode method. Through comparing the entanglement decays under the three different environment models, we find that the entangled Bell-like state cos θ |ee> + sin θ |gg> will be kept in the single reservoir model for a time longer than in the other two models. However, the entanglement decay behavior of Bell-like state cos θ |eg> + sin θ |ge> is dependent on the specific environment model. Meanwhile, the comparison of entanglement decay between the above two Bell-like states at the same environment models is performed.

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