摘要
外场作用下,对称双势阱中将发生相干布居俘获现象.在氨分子模型中,当分子初始处在较低的本征态时,在一定的条件下激发态上将没有粒子数布居,外加光场强烈地使较低的双重态耦合在一起,且粒子数布居总保持为1,尽管此时外场与2〉→3〉接近共振.这是一般模型所不能得到的结论.
Coherent population trapping is shown to occur in a driven symmetric double-well potential.In the model of the ammonia molecule,for a molecule initially prepared in its lower doublet,under certain circumstances,the upper level remains unpopulated,this occurs in spite of the fact that the laser field is resonant with the 2〉→3〉 trasition.This is a coherent population trapping phenomenon which cannot be accounted for with the convential models.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第8期4685-4688,共4页
Acta Physica Sinica
基金
国家自然科学基金(批准号:50271038)资助的课题~~
关键词
相干布居俘获
Ξ型三能级系统
双势阱
coherent population trapping,-type three-level system,double-well
