双阱势中玻色-爱因斯坦凝聚原子

Bose-Einstein Condensed Atoms in a Double Well Potential

本文讨论了对称双阱势中玻色－爱因斯坦凝聚原子几个性质，其中包括隧道效应、原子的干涉及与驻波光场相互作用的动力学等等．结果表明，在这样的双阱势中，尽管隧道效应存在，凝聚在两个阱中的平均原子数依然相等，这保证了原子干涉的可见度．而凝聚原子的干涉条纹与两阶中原子波包的动量差与动量和密切相关．此外，隧道效应的存在对驻波激光场与凝聚原子构成的体系的态函数和能谱等一些动力学性质都有明显影响．

Several properties of Bose-Einstein condensed atoms confined in a double well potential (DWP) are investigated, which include the tunneling effect, interfer- ence of the condensed atoms and the dynamics of the atom-standing wave laser field system. It is shown that, in such a DWP, the average number of condensed atoms in the two traps is still same in presence of tunneling effect, this ensures the visibility of interference fringes of atoms. The interference fringes are closely related to the difference and sum of atomic wave packet of the two traps. Moreover, the present result manifests that the tunneling effect can obviously affect the dynamics properties such as wave function, energy spectrum of the atom-standing wave laser field system.