中国物理B ›› 2021, Vol. 30 ›› Issue (1): 10304-.doi: 10.1088/1674-1056/abc542

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  • 收稿日期:2020-09-15 修回日期:2020-10-16 接受日期:2020-10-28 出版日期:2020-12-17 发布日期:2020-12-23

Steady and optimal entropy squeezing for three types of moving three-level atoms coupled with a single-mode coherent field

Wen-Jin Huang(黄文进) and Mao-Fa Fang(方卯发)†   

  • Received:2020-09-15 Revised:2020-10-16 Accepted:2020-10-28 Online:2020-12-17 Published:2020-12-23
  • Contact: †Corresponding author. E-mail: mffang@hunnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12064012 and 11374096).

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Abstract: The entropy squeezing properties of different types of moving three-level atoms coupled with a single-mode coherent field are studied. The influences of the moving velocity and initial states of the three-level atom on the entropy squeezing are discussed. The results show that, the entropy squeezing properties of the three-level atom depend on its initial state, moving velocity, and the type. A stationary three-level atom can not obtain a steady entropy squeezing whatever initial conditions are chosen, while a moving three-level atom can achieve a steady and optimal entropy squeezing through choosing higher velocity and appropriate initial state. Our result provides a simple method for preparing squeezing resources with ultra-low quantum noise of the three-level atomic system without additional any complex techniques.

Key words: entropy squeezing, moving three-level atom, single-mode coherent field

中图分类号:  (Quantum information)

  • 03.67.-a
42.50.-p (Quantum optics) 03.65.Yz (Decoherence; open systems; quantum statistical methods)