Chin. Phys. Lett.  2006, Vol. 23 Issue (12): 3138-3142    DOI:
Original Articles |
Quantum Entanglement in a System of Two Spatially Separated Atoms Coupled to the Thermal Reservoir
LIAO Xiang-Ping1,2,3;FANG Mao-Fa1;ZHENG Xiao-Juan¹;CAI Jian-Wu1,2,3
¹Department of Physics, Hunan Normal University, Changsha 410081 ²Department of Physics and Electronics, Zhuzhou Teachers’ College, Zhuzhou 412007 ³Department of Physics, Hunan Industrial University, Zhuzhou 412000
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LIAO Xiang-Ping, FANG Mao-Fa, ZHENG Xiao-Juan&sup et al  2006 Chin. Phys. Lett. 23 3138-3142
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Abstract We study quantum entanglement between two spatially separated atoms coupled to the thermal reservoir. The influences of the initial state of the system, the atomic frequency difference and the mean number of the thermal field on the entanglement are examined. The results show that the maximum of the entanglement obtained with nonidentical atoms is greater than that obtained with identical atoms. The degree of entanglement is progressively decreased with the increase of the thermal noise. Interestingly, the two atoms can be easily entangled even when the two atoms are initially prepared in the most mixed states.

Keywords: 03. 65. Ud      03. 67. Mn      03. 65. Yz     
Published: 01 December 2006
PACS:  03. 65. Ud  
  03. 67. Mn  
  03. 65. Yz  
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http://cpl.iphy.ac.cn/       OR      http://cpl.iphy.ac.cn/Y2006/V23/I12/03138
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LIAO Xiang-Ping
FANG Mao-Fa
ZHENG Xiao-Juan&sup
CAI Jian-Wu
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