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The geometrical quantum discord (GQD) is an effective measure of quantum correlation in quantum systems. We have studied GQD dynamics of the system comprising two two-level atoms resonantly interacting with two coupled cavities. GQD between atoms and that between cavities are investigated. The influences of coupling constant between cavities and initial entanglement between atoms on GQD are discussed. Results obtained using a numerical method show that GQD between atoms is strengthened, and GQD between cavities is weakened with increasing initial entanglement between atoms. On the other hand, the evolution regularity of GQD between atoms and that between cavities are all strengthened with increasing coupling constant between cavities.
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Keywords:
- quantum optics /
- two-level atom /
- coupling cavities /
- geometrical quantum discord
[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] Lu D M 2013 Acta Optica Sinica 33 0127001 (in Chinese) [卢道明 2013 光学学报 33 0127001]
[4] Wootters W K 1998 Phys. Rev. Lett. 80 2245
[5] Lu D M 2011 Acta phys. Sin. 60 090302 (in Chinese) [卢道明 2011 60 090302]
[6] Wong A, Christensen N 2001 Phys. Rev. A 63 044301
[7] Zhang Y J, Zhou Y, Xia Y J 2008 Acta Phys. Sin. 57 21 (in Chinese)[张英杰, 周原, 夏云杰 2008 57 21]
[8] Wu C, Fang M F 2010 Chin. Phys. B 19 020309
[9] Chen L, Shao X Q, Zhang S 2009 Chin. Phys. B 18 888
[10] Yin Z Q, Li F L 2007 Phys. Rev. A 75 012324
[11] Zhang B 2010 Optics Communications 283 196
[12] Lu D M 2012 Acta Phys. Sin. 61 150303 (in Chinese) [卢道明 2012 61 150303]
[13] Ogden C D, Irish E K, Kim M S 2008 Phys. Rev. A 78 063805
[14] Serafini A, Mancini S, Bose S 2006 Phys. Rev. Lett. 96 010503
[15] Ollivier H, Zurek W H 2002 Phys. Rev. Lett. 88 017901
[16] Dakic B, Vedral V, Brukner C 2010 Phys Rev Lett. 105 190502
[17] Fan K M, Zhang G F 2013 Acta Phys. Sin. 62 130301 (in Chinese) [樊开明, 张国锋 2013 62 130301]
[18] Wang C, Chen Q H 2013 Chin. Phys. B 22 040304
[19] Luo S L, Fu S S 2010 Phys. Rev. A 82 034302
[20] Giorda P, Paris M G A 2010 Phys. Rev. Lett. 105 020503
[21] Sarandy M S 2009 Phys. Rev. A 80 022108
[22] Ali M, Rau A R P, Alber G 2010 Phys. Rev. A 81 042105
[23] Wang B, Xu Z Y, Chen Z Q, Feng M 2010 Phys. Rev. A 81 014101
[24] Wang L C, Shen J, Yi X X 2011 Chin. Phys. B 20 050306
[25] Jiang F J, Lu H J, Yan X H, Shi M J 2013 Chin. Phys. B 22 040303
[26] Xu P, Wang D, Ye L 2013 Chin. Phys. B 22 1000306
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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] Lu D M 2013 Acta Optica Sinica 33 0127001 (in Chinese) [卢道明 2013 光学学报 33 0127001]
[4] Wootters W K 1998 Phys. Rev. Lett. 80 2245
[5] Lu D M 2011 Acta phys. Sin. 60 090302 (in Chinese) [卢道明 2011 60 090302]
[6] Wong A, Christensen N 2001 Phys. Rev. A 63 044301
[7] Zhang Y J, Zhou Y, Xia Y J 2008 Acta Phys. Sin. 57 21 (in Chinese)[张英杰, 周原, 夏云杰 2008 57 21]
[8] Wu C, Fang M F 2010 Chin. Phys. B 19 020309
[9] Chen L, Shao X Q, Zhang S 2009 Chin. Phys. B 18 888
[10] Yin Z Q, Li F L 2007 Phys. Rev. A 75 012324
[11] Zhang B 2010 Optics Communications 283 196
[12] Lu D M 2012 Acta Phys. Sin. 61 150303 (in Chinese) [卢道明 2012 61 150303]
[13] Ogden C D, Irish E K, Kim M S 2008 Phys. Rev. A 78 063805
[14] Serafini A, Mancini S, Bose S 2006 Phys. Rev. Lett. 96 010503
[15] Ollivier H, Zurek W H 2002 Phys. Rev. Lett. 88 017901
[16] Dakic B, Vedral V, Brukner C 2010 Phys Rev Lett. 105 190502
[17] Fan K M, Zhang G F 2013 Acta Phys. Sin. 62 130301 (in Chinese) [樊开明, 张国锋 2013 62 130301]
[18] Wang C, Chen Q H 2013 Chin. Phys. B 22 040304
[19] Luo S L, Fu S S 2010 Phys. Rev. A 82 034302
[20] Giorda P, Paris M G A 2010 Phys. Rev. Lett. 105 020503
[21] Sarandy M S 2009 Phys. Rev. A 80 022108
[22] Ali M, Rau A R P, Alber G 2010 Phys. Rev. A 81 042105
[23] Wang B, Xu Z Y, Chen Z Q, Feng M 2010 Phys. Rev. A 81 014101
[24] Wang L C, Shen J, Yi X X 2011 Chin. Phys. B 20 050306
[25] Jiang F J, Lu H J, Yan X H, Shi M J 2013 Chin. Phys. B 22 040303
[26] Xu P, Wang D, Ye L 2013 Chin. Phys. B 22 1000306
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