费米气体在光晶格中的自俘获现象及其周期调制  

Self-trapping and periodic modulation of Fermi gases in optical lattices

作　　者：苟学强[1] 闫明[1] 令伟栋[1] 赵红玉[1] 段文山[1] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070

出　　处：《物理学报》2013年第13期100-104,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11275156)资助的课题~~

摘　　要：研究了一维光晶格中费米气体从BCS区过渡到unitarity区研究相图及周期调制现象.通过调节散射长度与耠合系数对相图的影响,发现在unitarity区,从约瑟夫振荡到振荡自俘获及振荡自俘获到自俘获,存在耦合系数的临界值,同时得到了临界耦合系数与散射长度的关系.The change of phase space and periodic modulation of Fermi gas from the BCS to unitarity is investigated in one-dimensional optical lattice. Through controlling the scattering length and coupling constant in unitarity, we find the critical values （from the Josephson oscillation to the oscillating-phase-type self-trapping and from the latter to the self-trapping）, at the same time, we also find the relationship between the critical coupling constants and the scattering length.

关 键 词：费米气体 自俘获 周期调制 

分 类 号：O431.2[机械工程—光学工程]