Vortex stability and persistent currents in trapped Bose gases

被引:193
作者
Rokhsar, DS
机构
[1] Department of Physics, University of California, Berkeley, CA
关键词
D O I
10.1103/PhysRevLett.79.2164
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider the stability of vortices in trapped dilute Bose gases. For weak coupling the vortex is unstable to single-particle excitations: the Bose condensate cannot support persistent currents, and the gas is not superfluid. For stronger coupling the azimuthal symmetry of the rotating condensate is spontaneously broken, resulting in an off-center vortex that eventually spirals out of the trap.
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页码:2164 / 2167
页数:4
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