Kerr介质中耦合全同V型三能级原子与真空场作用场熵的量子性质  

Field entropy properties of coupled identical V-type three-level atoms interacting with vacuum field in cavity filled with Kerr-like medium

作　　者：李可[1] 令维军[1] 王志坚[1] 

机构地区：[1]天水师范学院物理系,甘肃天水741001

出　　处：《量子电子学报》2011年第6期699-704,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60878020);天水师范学院青蓝工程资助项目

摘　　要：利用全量子理论,研究了真空场与耦合全同V型三能级原子相互作用过程中场熵的演化特性。讨论了系统初始状态、原子间偶极相互作用和Kerr介质的三阶非线性系数对场熵演化特性的影响。数值计算结果表明:初始时刻原子基态和激发态处于合适的叠加态时,场熵呈现出周期性振荡,其振荡频率和幅度与原子间的耦合常数、Kerr介质的三阶非线性系数有很大关系。由此可见,场熵敏感于系统初始时刻原子的状态。The entropy properties of field in the system of coupled identical V-type three-level atoms inter- acting with vacuum field in cavity filled with Kerr-like medium are studied by means of quantum theory. The time evolution of entropy of field via the initial state of the atomic system, coupling coefficient between the atoms and Kerr coefficient are discussed. Numerical calculation results show that when the ground state and excited state of atoms are in appropriate sup oscillation. The oscillation frequency and amplitu erposi de are tions state, the entropy of field is behaving periodic depending on the coupling constant between atoms and the third-order nonlinear coefficient of Kerr-like medium. Therefore, the entropy,of field is very sensitive to the atomic initial state.

关 键 词：量子光学 熵 耦合V型三能级原子 KERR介质 

分 类 号：O431.2[机械工程—光学工程]