弱相干场耦合腔系统中的纠缠特性

卢道明

doi:10.7498/aps.62.030302

摘要

研究由三个全同的二能级原子与耦合腔构成的系统, 考虑腔场处于弱相干态的情况. 采用Negativity熵度量两子系统间的纠缠, 利用数值计算方法研究了两个原子之间和两个腔场之间的纠缠性质. 讨论了腔场间的耦合系数和腔场的强度对纠缠特性的影响. 研究结果表明: 随光场强度增大, 原子间纠缠和腔场间纠缠均增强. 另一方面, 随耦合腔的耦合系数增大, 两原子间的纠缠减弱, 腔A和腔B间的纠缠增强; 而腔B和腔C间的纠缠, 以及腔A和腔C间纠缠与腔场间的耦合系数间存在非线性关系.

关键词:

Abstract

We study the entanglement dynamics of the system comprising three two-level atoms resonantly interacting with three coupled cavities which are in weak coherent states initially. The atom-atom entanglement and cavity-cavity entanglement are investigated. The influences of coupling constant between cavities and intensity of the cavity field on entanglement properties are discussed. The results obtained using the numerical method show that atom-atom entanglement and cavity-cavity entanglement are both strengthened with the increase of intensity of the cavity field; on the other hand, atom-atom entanglement is weakened and the entanglement between cavity A and cavity B is strengthened with the increase of the coupling constant between cavities, and the entanglement between cavity B and cavity C has a nonlinear relation with the increase of the cavity-cavity coupling coefficient. These results are different from those in the case that cavity field is in vacuum state initially.

Keywords:

作者及机构信息

卢道明

1.
武夷学院电子工程系, 武夷山 354300

基金项目: 福建省自然科学基金(批准号: 2011J01018)资助的课题.

Authors and contacts

Lu Dao-Ming

1.
Department of Electronic Engineering, Wuyi University, Wuyishan 354300, China

Funds: Project supported by by the Natural Science Foundation of Fujian Province, China (Grant No. 2011J01018).

参考文献

[1]	Hagley E, Maitre X, Nogues G, Wunderlich C, Brune M, Raimond J M, Haroche S 1997 Phys. Rev. Lett. 79 1
[2]	Osnaghi S, Bertet P, Auffeves A, Maioli P, Brune M, Raimond J M, Haroche S 2001 Phys. Rev. Lett. 87 037902
[3]	Rauschenbeutel A, Nogues G, Osnaghi S, Bertet P, Brune M, Raimond J M, Haroche S 2000 Science 288 2024
[4]	Rauschenbeutel A, Nogues G, Osnaghi S, Bertet P, Brune M, Raimond J M, Haroche S 1999 Phys. Rev. Lett. 83 5166
[5]	Zheng S B, Guo G C 2000 Phys. Rev. Lett. 85 2392
[6]	Yang Z B 2007 Chin. Phys. 16 329
[7]	Zheng S B, Yang C P, Nori F 2010 Phys. Rev. A 82 042327
[8]	Peng P, Li F L 2007 Phys. Rev. A 75 062320
[9]	Liao Q H, Fang G Y, Wang J C, Wang Y Y, Ahman M A, Liu S T 2011 Int. J. Theor. Phys. 50 2622
[10]	Xiao X, Fang M F 2009 Chin. Phys. B 18 4695
[11]	Lu D M 2011 Acta Phys. Sin. 60 090302 [卢道明 2011 物理学报 60 090302]
[12]	Yin Z Q, Li F L 2007 Phys. Rev. A 75 012324
[13]	Ogden C D, Irish E K, Kim M S 2008 Phys. Rev. A 78 063805
[14]	Hartmann M J, Brandao F G S L, Plenio M B 2007 Phys. Rev. Lett. 99 160501
[15]	Zheng S B, Yang C P, Nori F 2010 Phys. Rev. A 82 042327
[16]	Song J, Sun X D, Xia Y, Song H S 2011 Phys. Rev. A 83 052309
[17]	Li W A 2010 Opt. Commun. 283 2978
[18]	Liao C G, Yang Z B, Luo C L, Chen Z H 2011 Opt. Commun. 284 1920
[19]	Zhang Y Q, Hu Z D, Xu J B 2011 Int. J. Theor. Phys. 50 2438
[20]	Pellizzari T 1997 Phys. Rev. Lett. 79 5242
[21]	Ciccarello F 2011 Phys. Rev. A 83 043802
[22]	Zheng S B 2010 Chin. Phys. B 19 064204
[23]	Li Y L, Fang M F 2009 Chin. Phys. B 20 050314
[24]	Zhou Y L, Wang Y M, Liang L M, Li C Z 2009 Phys. Rev. A 79 044304
[25]	Alexanian M 2011 Phys. Rev. A 83 023814
[26]	Lu D M 2012 Acta Phys. Sin. 61 150303 [卢道明 2012 物理学报 61 150303]

施引文献

[1]	Hagley E, Maitre X, Nogues G, Wunderlich C, Brune M, Raimond J M, Haroche S 1997 Phys. Rev. Lett. 79 1
[2]	Osnaghi S, Bertet P, Auffeves A, Maioli P, Brune M, Raimond J M, Haroche S 2001 Phys. Rev. Lett. 87 037902
[3]	Rauschenbeutel A, Nogues G, Osnaghi S, Bertet P, Brune M, Raimond J M, Haroche S 2000 Science 288 2024
[4]	Rauschenbeutel A, Nogues G, Osnaghi S, Bertet P, Brune M, Raimond J M, Haroche S 1999 Phys. Rev. Lett. 83 5166
[5]	Zheng S B, Guo G C 2000 Phys. Rev. Lett. 85 2392
[6]	Yang Z B 2007 Chin. Phys. 16 329
[7]	Zheng S B, Yang C P, Nori F 2010 Phys. Rev. A 82 042327
[8]	Peng P, Li F L 2007 Phys. Rev. A 75 062320
[9]	Liao Q H, Fang G Y, Wang J C, Wang Y Y, Ahman M A, Liu S T 2011 Int. J. Theor. Phys. 50 2622
[10]	Xiao X, Fang M F 2009 Chin. Phys. B 18 4695
[11]	Lu D M 2011 Acta Phys. Sin. 60 090302 [卢道明 2011 物理学报 60 090302]
[12]	Yin Z Q, Li F L 2007 Phys. Rev. A 75 012324
[13]	Ogden C D, Irish E K, Kim M S 2008 Phys. Rev. A 78 063805
[14]	Hartmann M J, Brandao F G S L, Plenio M B 2007 Phys. Rev. Lett. 99 160501
[15]	Zheng S B, Yang C P, Nori F 2010 Phys. Rev. A 82 042327
[16]	Song J, Sun X D, Xia Y, Song H S 2011 Phys. Rev. A 83 052309
[17]	Li W A 2010 Opt. Commun. 283 2978
[18]	Liao C G, Yang Z B, Luo C L, Chen Z H 2011 Opt. Commun. 284 1920
[19]	Zhang Y Q, Hu Z D, Xu J B 2011 Int. J. Theor. Phys. 50 2438
[20]	Pellizzari T 1997 Phys. Rev. Lett. 79 5242
[21]	Ciccarello F 2011 Phys. Rev. A 83 043802
[22]	Zheng S B 2010 Chin. Phys. B 19 064204
[23]	Li Y L, Fang M F 2009 Chin. Phys. B 20 050314
[24]	Zhou Y L, Wang Y M, Liang L M, Li C Z 2009 Phys. Rev. A 79 044304
[25]	Alexanian M 2011 Phys. Rev. A 83 023814
[26]	Lu D M 2012 Acta Phys. Sin. 61 150303 [卢道明 2012 物理学报 61 150303]

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