光场与V型三能级原子依赖强度耦合系统场熵的演化特性  

Evolution of the entropy of light field interacting with the V-type three-level atom via intensity-dependent coupling

作　　者：黄春佳[1] 贺慧勇[1] 孔凡志[1] 方家元[1] 

机构地区：[1]长沙理工大学物理与电子科学系,长沙410077

出　　处：《物理学报》2004年第8期2539-2543,共5页Acta Physica Sinica

基　　金：湖南省教育厅科研基金 (批准号 :0 3A0 0 3 )资助的课题 .~~

摘　　要：研究了光场与V型三能级原子依赖强度耦合系统场熵的演化特性 ,讨论了单光子跃迁失谐量和初始光子数对场熵演化的影响 .研究结果表明 ,当失谐量比较小且初始光场较弱时 ,场熵的时间演化行为与单光子Jaynes_Cummings模型相似 ;当失谐量足够大或初始光场足够强时 。The evolution properties of the entropy of a single_mode light field interacting with the V_type three_level atom via intensity_dependent coupling have been studied. The discussion is centered on the influence of detuning and initial photon number on the field entropy evolution. The results show that the behavior of the field entropy is non_periodic for the cases of small detuning and weak initial light field,being similar to the single_photon Jaynes_Cummings model (JCM). On the contrary,the field entropy evolution is periodic for the cases of large detuning or strong initial light field,being similar to the two_photon JCM.

关 键 词：单模辐射场 V型三能级原子 依赖强度耦合系统 场熵演化 失谐量 双光子JAYNES-CUMMINGS模型 

分 类 号：O562[理学—原子与分子物理]