Self-trapping and Macroscopic Tunnelling of Superfluid Fermi Gases in Multi-well Potentials  

作　　者：徐红萍 薛具奎 

机构地区：[1]Key Laboratory of Atomic&Molecular Physics and Functional Materials of Gansu Province,College of Physics and Electronics Engineering,Northwest Normal University

出　　处：《Communications in Theoretical Physics》2012年第7期34-38,共5页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos. 10975114 and 10774120;the Natural Science Foundation of Gansu Province of China under Grant No. 1010RJZA012;the Natural Science Foundation of Northwest Normal University of China under Grant No. NWNU-KJCXGC-03-48;the Youthy Teacher Scientific Research Foundation of Northwest Normal University of China under Grant No. NWNU-LKQN-09-10

摘　　要：We study the tunnelling dynamics of superfluid Fermi gases trapped in multi-well system along the BEC-BCS crossover. Within the hydrodynamical model and by using the multi-mode approximation, the self-trapping dynamics of superfluid Fermi gases in multi-well system are obtained numerically. We find that the self-trapping to diffusion transition strongly depends on the well number. When the well number is less than three, the self-trapped state takes place easier on the BEC side than that on the BCS side. However, when the well number is larger than three, the self-trapped state takes place easier on the BCS side instead of the BEC side. Furthermore, by considering a superfluid of 40K atoms, we obtain the zero-mode and π-mode Josephson frequencies of coherent atomic oscillations in double-well system. It is noteworthy that the Josephson mode, especially, the existence of π-mode frequency strongly depends on the atoms number on the BCS side.

关 键 词：superfluid fermi gases multi-well potentials self-trapping and macroscopic tunnelling 

分 类 号：O562[理学—原子与分子物理]