2个原子与2个耗散腔场量子体系中线性熵的研究  

Study of linear entropy evolution in system of two atom-two dissipative cavity

作　　者：罗涛[1,2] 王雪迎[2] 潘淑梅[2] 郑泰玉[2] 

机构地区：[1]长春师范学院物理学院,吉林长春130032 [2]东北师范大学物理学院,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2011年第1期56-60,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(13002103)

摘　　要：应用J-C模型与相互作用绘景中的密度算符理论,研究了2个二能级Rydberg原子与2个纠缠耗散腔场单光子共振相互作用过程中线性熵的演化特性.推导了此体系中单个原子、单个场以及2个原子、2个腔场的线性熵公式,讨论了腔场的耗散系数和原子-光场相互作用耦合系数对各线性熵演化的振荡性及其周期性的影响.线性熵的时间演化周期与原子-腔场的相互作用耦合系数g成正比,耗散腔场的耗散系数k1和k2不仅影响线性熵演化的振荡趋势,而且影响线性熵的演化周期.In this paper,by using J-C model and the density operator theory in interaction picture,the evolution features of linear entropy were studied in the system of two two-level Rydberg atom and two entangled dissipative cavities with single-photon resonant interaction.The derivation was done of the linear entropy formula of a single atom,a single cavity,as well as two atoms,two cavities,and analyzed how the cavity dissipation coefficients and the atom-cavity interaction coupling coefficient influenced the oscillation model and the evolution period of linear entropies.The evolution periods of all linear entropies are inversely proportional to the constant g,the cavity dissipation constants k1 and k2 influence the modes and the periods of the linear entropies＇ evolution.

关 键 词：线性熵 耗散腔场 密度算符 J-C模型 

分 类 号：O413.2[理学—理论物理]