中国物理B ›› 2008, Vol. 17 ›› Issue (5): 1784-1790.doi: 10.1088/1674-1056/17/5/039

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Coherence-enhanced entanglement between two atoms at high temperature

胡要花, 方卯发, 姜春蕾, 曾 可   

  1. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2007-08-16 修回日期:2007-09-05 出版日期:2008-05-20 发布日期:2008-05-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025), Hunan Provincial Natural Science Foundation of China (Grant No 07JJ3013) and the Foundation of Hunan Provincial Education Department of China (Grant Nos 06A038 and

Coherence-enhanced entanglement between two atoms at high temperature

Hu Yao-Hua(胡要花), Fang Mao-Fa(方卯发)†, Jiang Chun-Lei(姜春蕾), and Zeng Ke(曾可)   

  1. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • Received:2007-08-16 Revised:2007-09-05 Online:2008-05-20 Published:2008-05-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025), Hunan Provincial Natural Science Foundation of China (Grant No 07JJ3013) and the Foundation of Hunan Provincial Education Department of China (Grant Nos 06A038 and

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摘要： This paper studies the entanglement properties in a system of two dipole--dipole coupled two-level atoms resonantly interacting with a single-mode thermal field. The results show that, when the temperature of the cavity is high enough (corresponding to the large value of the mean photon number), the entanglement is greatly enhanced due to the initial atomic coherence. These results are helpful for controlling the atomic entanglement by changing the initial parameters of the system.

Abstract: This paper studies the entanglement properties in a system of two dipole--dipole coupled two-level atoms resonantly interacting with a single-mode thermal field. The results show that, when the temperature of the cavity is high enough (corresponding to the large value of the mean photon number), the entanglement is greatly enhanced due to the initial atomic coherence. These results are helpful for controlling the atomic entanglement by changing the initial parameters of the system.

Key words: entanglement, single-mode thermal field, atomic coherence

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
03.65.Ud (Entanglement and quantum nonlocality) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)