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.
(Mechanical effects of light on atoms, molecules, and ions)
Fund: 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).
Cite this article:
Liu Wang-Yun(刘王云), An Yu-Ying(安毓英), and Yang Zhi-Yong(杨志勇) Properties of field quantum entropy evolution in the Jaynes--Cummings model with initial squeezed coherent states field 2007 Chinese Physics 16 3704
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