中国物理B ›› 2007, Vol. 16 ›› Issue (12): 3704-3709.doi: 10.1088/1009-1963/16/12/025

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Properties of field quantum entropy evolution in the Jaynes--Cummings model with initial squeezed coherent states field

刘王云, 安毓英, 杨志勇   

  1. School of Technical Physics, Xidian University, Xi'an 710071, China
  • 出版日期:2007-12-20 发布日期:2007-12-20
  • 基金资助:
    Project supported by the Natural Science Foundation of Shaanxi Province (Grant No 2001SL04), the Scientific and Technological Key Program Foundation of Shaanxi Province (Grant No 2002K05-G9).

Properties of field quantum entropy evolution in the Jaynes--Cummings model with initial squeezed coherent states field

Liu Wang-Yun(刘王云)†, An Yu-Ying(安毓英), and Yang Zhi-Yong(杨志勇)   

  1. School of Technical Physics, Xidian University, Xi'an 710071, China
  • Online:2007-12-20 Published:2007-12-20
  • Supported by:
    Project supported by the Natural Science Foundation of Shaanxi Province (Grant No 2001SL04), the Scientific and Technological Key Program Foundation of Shaanxi Province (Grant No 2002K05-G9).

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摘要： The properties of the field quantum entropy evolution in a system of a single-mode squeezed coherent state field interacting with a two-level atom is studied by utilizing the complete quantum theory, and we focus our attention on the discussion of the influences of field squeezing parameter $\gamma $, atomic distribution angle $\theta $ and coupling strength $g$ between the field and the atom on the properties of the evolution of field quantum entropy. The results obtained from numerical calculation indicate that the amplitude of oscillation of field quantum entropy evolution decreases with the increasing of squeezing parameter $\gamma $, and that both atomic distribution angle $\theta $ and coupling strength $g$ between the field and the atom can influence the periodicity of field quantum entropy evolution.

Abstract: The properties of the field quantum entropy evolution in a system of a single-mode squeezed coherent state field interacting with a two-level atom is studied by utilizing the complete quantum theory, and we focus our attention on the discussion of the influences of field squeezing parameter $\gamma $, atomic distribution angle $\theta $ and coupling strength $g$ between the field and the atom on the properties of the evolution of field quantum entropy. The results obtained from numerical calculation indicate that the amplitude of oscillation of field quantum entropy evolution decreases with the increasing of squeezing parameter $\gamma $, and that both atomic distribution angle $\theta $ and coupling strength $g$ between the field and the atom can influence the periodicity of field quantum entropy evolution.

Key words: quantum field entropy, single-mode squeezed coherent states, Jaynes-Cummings model

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

  • 42.50.Dv
42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption) 37.10.Vz (Mechanical effects of light on atoms, molecules, and ions)