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采用几何量子失协度量两个子系统间的关联，利用数值计算方法研究了原子-腔-光纤复合系统中两个原子之间和两个腔场之间的几何量子失协. 讨论了腔场与光纤模间的耦合系数和弱相干场强度变化对几何量子失协的影响. 研究结果表明：两原子之间和两腔场之间的几何量子失协均随时间作周期性演化，其演化频率随腔场与光纤模间的耦合系数增大而增大. 另一方面，随弱相干场强度增大，两原子间和两腔场间的几何量子失协增大. 这表明随弱相干场强度增大两原子间或两腔场间的关联增强.
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关键词:
- 量子光学 /
- 弱相干腔场 /
- 原子-腔-光纤复合系统 /
- 量子失协
Geometrical quantum discord (GQD) is an effective measure of quantum correlation in quantum systems. We study GQD dynamics in an atom-cavity-fiber system. GQD between atoms and that between cavities are investigated. The influences of coupling constant between cavity and fiber and the intensity of the cavity field on GQD are discussed. Results show that GQD between atoms and that between cavities all display periodical evolutions, and their evolution frequencies increase with increasing coupling constant between cavity and fiber. On the other hand, the GQD between atoms and that between cavities are all strengthened with increasing intensity of the cavity field.-
Keywords:
- quantum optics /
- weak coherent field /
- atom-cavity-fiber compound system /
- quantum discord
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[19] Xu P, Wang D, Ye L 2013 Chin. Phys. B 22 1000306
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[21] Zhang B 2010 Opt. Commun. 283 196
[22] Lu D M 2011 Acta Phys. Sin. 60 090302 (in Chinese) [卢道明 2011 60 090302]
[23] Yang Z B, Xia Y, Zheng S B 2010 Opt. Commun. 283 3052
[24] Yin Z Q, Li F L 2007 Phys. Rev. A 75 012324
[25] Peng P, Li F L 2007 Phys. Rev. A. 75 062320
[26] Datta a, Shaji A, Caves C M 2008 Phys. Rev. Lett. 100 050502
[27] Lanyon B P, Barbreri M, Almeida M P, White A G 2008 Phys. Rev. Lett. 101 200501
[28] Groisman B, Popescu S, Winter A 2005 Phys. Rev. A 72 032317
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[1] Einstein A, Podolsky B, Rosen N 1935 Phys. Rev. 47 777
[2] Guo L, Liang X T 2009 Acta Phys. Sin. 58 50 (in Chinese) [郭亮, 梁先庭 2009 58 50]
[3] Zuo Z C, Xia Y J 2003 Acta Phys. Sin. 52 2687 (in Chinese) [左战春, 夏云杰 2003 52 2687]
[4] Lu D M 2013 Acta Optica Sinica 33 0127001 (in Chinese) [卢道明 2013 光学学报 33 0127001]
[5] Wootters W K 1998 Phys. Rev. Lett. 80 2245
[6] Wong A, Christensen N 2001 Phys. Rev. A 63 044301
[7] Wu C, Fang M F 2010 Chin. Phys. 19 020309
[8] Ollivier H, Zurek W H 2002 Phys. Rev. Lett. 88 017901
[9] Chen Q, Zhang C, Yu S, Yi X X, Oh C H 2011 Phys. Rev. A 84 042313
[10] Qian Y, Xu J B 2012 Chin. Phys. Lett. 29 040302
[11] Wang B, Xu Z Y, Chen Z Q, Feng M 2010 Phys. Rev. A 81 014101
[12] Luo S L, Fu S S 2010 Phys. Rev. A 82 034302
[13] He Z, Li L W 2013 Acta Phys. Sin. 62 180301 (in Chinese) [贺志, 李龙武 2013 62 180301]
[14] Jiang F J, Lu H J, Yan X H, Shi M J 2013 Chin. Phys. B 22 040303
[15] Wang L C, Shen J, Yi X X 2011 Chin. Phys. B 20 050306
[16] Sun Z Y, Li L, Yao K L, Du G H, Liu J W, Luo B, Li N, Li H N 2010 Phys. Rev. A 82 032310
[17] Sarandy M S 2009 Phys. Rev. A 80 022108
[18] Wang C, Chen Q H 2013 Chin. Phys. B 22 040304
[19] Xu P, Wang D, Ye L 2013 Chin. Phys. B 22 1000306
[20] Dakic B, Vedral V, Brukner C 2010 Phys. Rev. Lett. 105 190502
[21] Zhang B 2010 Opt. Commun. 283 196
[22] Lu D M 2011 Acta Phys. Sin. 60 090302 (in Chinese) [卢道明 2011 60 090302]
[23] Yang Z B, Xia Y, Zheng S B 2010 Opt. Commun. 283 3052
[24] Yin Z Q, Li F L 2007 Phys. Rev. A 75 012324
[25] Peng P, Li F L 2007 Phys. Rev. A. 75 062320
[26] Datta a, Shaji A, Caves C M 2008 Phys. Rev. Lett. 100 050502
[27] Lanyon B P, Barbreri M, Almeida M P, White A G 2008 Phys. Rev. Lett. 101 200501
[28] Groisman B, Popescu S, Winter A 2005 Phys. Rev. A 72 032317
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