运动级联型三能级原子双光子过程的熵演化  

Evolution of atom entropy in a moving cascade three-level atom in a two-photon process

作　　者：张金芳[1] 谭磊[1] 刘利伟[1] 丁彩英[1] 

机构地区：[1]兰州大学理论物理研究所,兰州730000

出　　处：《物理学报》2008年第4期2205-2211,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10704031);兰州大学理论物理与数学纯基础科学基金(批准号:LZU05001);国家基础科学人才培养基金(批准号:J0630313)资助的课题~~

摘　　要：研究了运动级联型三能级原子与单模场双光子相互作用过程中场(原子)熵的演化特性.讨论了当运动原子初始处于相干叠加态时,原子运动、场模函数、初始场的平均光子数n—对场熵演化的影响.结果表明:熵演化的周期依赖于原子的运动和场模函数的取值,而初始场的平均光子数n—只影响最大和次最小熵值,不改变熵演化的周期.The entropy evolution properties of field （atom） in a moving cascade three-level atom interacting with a single-mode field are studied through two photon transitions. When the atom is initially in coherent state, the influences of the atomic motion, the field-mode structure parameter and the initial average photon number on the evolution of the entropy are discussed. The results show that the entropy evolution period of the field is dependent of the atomic motion and the fleld-mode structure parameter. However, the parameter of the initial average photon number will neither lengthen nor shorten the entropy evolution period of the field, but the numerical values of maximum and sub-minimum of entropy will be affected by it.

关 键 词：双光子 运动巨型三能级原子 熵 

分 类 号：O431.2[机械工程—光学工程] O431[理学—光学]