耗散原子-腔场复合系统中线性熵的演化特性  

Properties of linear entropy evolution in dissipative atom-cavity system

作　　者：侯国相 杨晓明[2,3] 郑泰玉[2] 

机构地区：[1]锦州师范高等专科学校物理系,辽宁锦州121000 [2]东北师范大学物理学院,吉林长春130024 [3]哈尔滨师范大学阿城学院,黑龙江哈尔滨150300

出　　处：《辽宁工程技术大学学报（自然科学版）》2009年第3期505-508,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(13002103)

摘　　要：应用全量子理论研究了两个纠缠的耗散腔场与穿过其中一个腔场的二能级Rydberg原子相互作用过程中原子的线性熵、两个腔场的线性熵及原子-腔场复合系统的线性熵的演化特性。通过数值计算,讨论了共振情况下耗散常数和原子-光场相互作用耦合强度对原子的线性熵、两个腔场的线性熵及原子-腔场复合系统的线性熵演化特性的影响。结果表明:原子的线性熵、两个腔场的线性熵、原子-腔场复合系统的线性熵的演化都较强地依赖于原子-光场相互作用耦合强度和耗散常数。耗散常数和原子-光场相互作用强度不仅影响量子场熵演化的振荡性,而且影响线性场熵演化的周期性。Based on quantum theory, an investigation is conducted on the evolution characteristics of linear entropies of 1） atoms, 2） two cavities and 3） atom-cavity system in the interaction process of two entangled dissipative cavities and a single two-level atom which runs through one of cavities. The effect of the dissipative constant and the coupling strength of interaction between atom and cavity field on all three linear entropies is discussed for the resonant case. The results show that all three linear entropies strongly depend on the dissipative constant of cavity and the coupling strength between cavity field and atoms. Furthermore, the dissipative constant and the strength of interaction betweenatoms and cavity field affect not only the amplitude of the oscillation of field quantum entropy evolution but also its periodicity.

关 键 词：线性熵 耗散腔场 二能级原子 

分 类 号：O413[理学—理论物理]