幺正极限附近费米气体反常激发模式的涡旋  

Vortex of an anomalous mode in Fermi gas near unitarity limit

作　　者：周昱[1] 周青春[1] 马晓栋[2] 

机构地区：[1]江苏科技大学数理学院,镇江212003 [2]新疆师范大学物理与电子工程学院,乌鲁木齐830054 Jiangsu Univ Sci & Technol, Sch Math & Phys, Zhenjiang 212003, Peoples R China; Xinjiang Normal Univ, Sch Phys & Elect Engn, Urumuchi 830054, Peoples R China

出　　处：《物理学报》2013年第14期28-32,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11047101;11105039;11205071;11264039)资助的课题~~

摘　　要：在幺正极限附近研究了处于旋转外势中费米气体的量子化涡旋动力学.选取适当的试探波函数并利用含时变分法,得到了小振幅涡旋运动方程及描述其反常激发模式的解.详细讨论了在幺正极限附近的反常模式产生的条件.结果显示系统囚禁外势的临界转动频率在幺正极限附近随粒子间相互作用参数的增加而变大,而涡旋进动的周期则随着粒子间相互作用参数的增加而减小.We investigate the dynamics of a quantized vortex in a trapped superfluid Fermi gas near the unitarity limit. By taking a trial wave function for the order-parameter of a condensate in a rotating axisymmetric trap confinement and using a time-dependent variational analysis we obtain the equations of motion and their solutions for anomalous mode. The results show that the critical rotating frequency of the trap increases when the system ranges from the left to the right side of the unitarity limit, while the period of the vortex decreases in this regime.

关 键 词：费米气体 涡旋 幺正极限 

分 类 号：O413.1[理学—理论物理]