摘要
本文采用时间演化算符方法和数值计算研究了相干光场与混合态二能级原子双光子过程的粒子数反转特性，结果表明：量子崩塌与复苏性质和原子初始的混合程度无关，但振荡最大幅值受原子初始混合程度的支配，随着原子初始混合程度的增大，原子反转几率减小；在强场作用下，这种量子崩塌与复苏性质，将随着ｎ值的不断增大而重复地出现复苏收缩现象。
In
this paper,the properties of the atomic particle number inversion in the two photon process with
two level atomic mixed state are studied by means of the time evolution operator method and
numerical calculation.The results show that the quantum collapse and revival properties do not
depend on while the amplitude of the revival maxima do depend on the mixing extent of the
atomic initial state.The probability of the atomic partical number inversion will become smaller
as the mixing extent of the atomic initial state is getting larger.Under strong coherent field of
initial state,with the increasing of the value of n,the phenomenon of revival shrink will arise
repeatedly,and the nonlinear coupling between the field and the atom is getting the stronger and
the stronger.
出处
《光子学报》
EI
CAS
CSCD
1999年第7期591-595,共5页
Acta Photonica Sinica
基金
江西省自然科学基金
关键词
统计混合态
双光子
粒子数反转
二能级原子
Statistic mixed state
Tow photon
Particle number inversion
Strong
field
