外场作用下BaF分子发射光子累积量及等待时间分布的研究  

Cumulants and waitingtime distribution of the photon emission from driven BaF molecule

作　　者：古丽姗[1] 彭勇刚[2] 

机构地区：[1]昌吉学院物理系,昌吉831100 [2]山东大学物理学院,济南250100

出　　处：《物理学报》2016年第9期70-75,共6页Acta Physica Sinica

基　　金：新疆维吾尔自治区高校科研计划科学研究重点项目(批准号:XJEDU2011I53);国家自然科学基金(批准号:11404189);山东省自然科学基金(批准号:ZR2013AQ020);教育部博士点基金(批准号:20130131120006)资助的课题~~

摘　　要：利用产生函数方法对BaF分子在激光场与射频场作用下发射光子的累积量及等待时间分布进行了研究.累积量κ_1和κ_2表明在固有偶极和射频场的作用下,系统表现出外场辅助吸收的现象,即当?_1=nω_(rf)时,系统存在吸收峰.二阶、三阶等待时间分布呈现出明显的振荡现象.In this paper,we consider a single Ba F molecule driven by an external field.When the symmetry is broken,the states of the Ba F molecule demonstrate the permanent dipole moments.An external laser field to excite Ba F molecule transition from its ground state to its excited state,and a radio frequency field couple with the permanent dipole moment of the Ba F.The first order and second order cumulants of the emission photons and the waiting time distribution are studied via the recently developed generating function approach,which is very convenient to study the counting statistics and the corresponding probability distributions.The results demonstrate that the radio frequency field could help the Ba F molecule to absorb photons from the driving field.The second and third order waiting time distributions oscillate with the evolution time,which reflects the states oscillating with the external radio frequency field.

关 键 词：产生函数 累积量 等待时间分布 

分 类 号：O572.31[理学—粒子物理与原子核物理]