一个特殊模型中的相干布居俘获

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. 关键词： 相干布居俘获 Ξ型三能级系统 双势阱

Coherent population trapping in a specific model

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.