中国物理B ›› 2009, Vol. 18 ›› Issue (12): 5144-5148.doi: 10.1088/1674-1056/18/12/008

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Finite-time disentanglement induced by single-mode thermal field

夏云杰1, 韩峰2   

  1. (1)College of Physics and Engineering, Qufu Normal University, Qufu 273165, China; (2)Department of Physics, Jining University, Qufu 273155, China;College of Physics and Engineering, Qufu Normal University, Qufu 273165, China
  • 收稿日期:2009-03-10 修回日期:2009-04-09 出版日期:2009-12-20 发布日期:2009-12-20
  • 基金资助:
    Project supported by National Natural Science Foundation of China (Grant No 10774088).

Finite-time disentanglement induced by single-mode thermal field

Han Feng(韩峰)a)b)† and Xia Yun-Jie(夏云杰)b)   

  1. a Department of Physics, Jining University, Qufu 273155, China; b College of Physics and Engineering, Qufu Normal University, Qufu 273165, China
  • Received:2009-03-10 Revised:2009-04-09 Online:2009-12-20 Published:2009-12-20
  • Supported by:
    Project supported by National Natural Science Foundation of China (Grant No 10774088).

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摘要： In this paper, we study the entanglement dynamics of atoms locally coupled to a cavity field. By studying two different models within the framework of cavity QED, we show that the so-called atomic entanglement sudden death always occurs if initially the cavity field is in the thermal state, in clear contrast with that in the vacuum state where the same entanglement decay is in infinite time.

Abstract: In this paper, we study the entanglement dynamics of atoms locally coupled to a cavity field. By studying two different models within the framework of cavity QED, we show that the so-called atomic entanglement sudden death always occurs if initially the cavity field is in the thermal state, in clear contrast with that in the vacuum state where the same entanglement decay is in infinite time.

Key words: entanglement sudden death, thermal fields

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
42.50.Dv (Quantum state engineering and measurements) 42.50.Pq (Cavity quantum electrodynamics; micromasers)