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

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

doi:10.7498/aps.61.230302

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.

Keywords:

Authors and contacts

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
Funds: 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).

References

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Cited By

[1]	Ai Q, Wang Y D, Long G L, Sun C P 2009 Sci. China-Phys. Mech. Astron. 52 1898
[2]	Xu G F, Kwek L C, Tong D M 2012 Sci. China-Phys. Mech. Astron. 55 808
[3]	Ma X S, Ren M F, Zhao G X 2011 Sci. China-Phys. Mech. Astron. 54 1833
[4]	Qian Y, Zhang Y Q, Xu J B 2012 Chin. Sci. Bull. 57 1637
[5]	Wu R B, Zhang J, Li C W, Long G L, Tarn T J 2012 Chin. Sci. Bull. 57 2194
[6]	Yu T, Eberly J H 2004 Phys. Rev. Lett. 93 140404
[7]	Yu T, Eberly J H 2009 Science 323 598
[8]	Zhang Y J, Man Z X, Xia Y J, Guo G C 2010 Eur. Phys. J. D 58 397
[9]	Bellomo B, Franco R L, Maniscalco S, Compagno G 2008 Phys. Rev. A 78 060302
[10]	Han F, Zhang M H 2011 Inter. Quantum Information 9 1533
[11]	Yu T, Eberly J H 2007 Quantum Inf. Comp. 7 459
[12]	Wootters W K 1998 Phys. Rev. Lett. 80 2245
[13]	Li Y, Guo H 2009 e-print arXiv:quant-ph/09090375
[14]	Zhang Y J, Man Z X, Xia Y J 2009 Eur. Phys. J. D 55 173
[15]	Garraway B M 1997 Phys. Rev. A 55 4636
[16]	Lopez C E, Romero G, Lastra F, Solano E, Retamal J C 2008 Phys. Rev. Lett. 101 080503

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Catalog

Vol. 61, Issue 23 - 2012-12-05

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