Entropy evolution of field with a time-varying frequency in the Jaynes-Cummings model  

作　　者：Qiu Changdong 

机构地区：[1]T（Department of Electronic Engineering, Wuyi University, Wuyishan, Fujian 354300,China

出　　处：《Engineering Sciences》2012年第2期78-83,共6页中国工程科学（英文版）

基　　金：Natural Science Foundation of Fujian Province under Grant(No.2008J0217)

摘　　要：Following Jaynes-Cummings model,the evolution of the field entropy in the system of a two-level atom interacting with the single mode coherent field is investigated under rotating-wave approximation.The typical case "the field frequency variance with time in the form of sine ω=ω0+usin(wt) has been considered.The influences of the amplitude and angle frequency of the field frequency variance on entropy evolution of the field are discussed by numerical calculations.Calculation results indicate that the field frequency variance influences violently the behavior of field entropy evolution;the larger the amplitude of the field frequency variance is,the stronger the influence of the field frequency variance on the time evolution of field entropy is.

关 键 词：two-level atom Jaynes-Cummings model frequency of field varying with time the evolution of the field entropy 

分 类 号：O431.2[机械工程—光学工程] O431[理学—光学]