静电场作用下双势阱分子隧道效应的猝灭及能级裂距的非线性特性研究

The study on quenching of the tunneling and nonlinear characteristic of energy splitting in double-well molecules with dc electric fields

讨论了在静电场作用下 ,双势阱分子中波函数随外加静电场定域的动态过程 ,以及能级裂距与外加静电场的关系 .证明了静电场作用后 ,能级裂距既受隧道效应的影响 ,又受外加静电场的影响 .所加静电场较小时与外场强度呈非线性关系 ,当外加静电场较大时 ,Stark效应对能级裂距的影响占了主导地位 ,使能级裂距随外加静电场线性地增大 .

In this paper we investigate the dynamic process of the localized wave function in double_well molecules using dc electric field and the relation between energy splitting and dc electric field. It is demonstrated that the energy splitting is affected by the tunneling and dc electric field, and the splitting of energy_level shows nonlinear characteristics when the dc electric field is very small. The Stark effect is dominant for the energy splitting as the intensity of the dc electric field becomes large, and the energy splitting increases linearly with the increase of the intensity of dc electric field.