Dipole oscillations of a Bose-Einstein condensate in the presence of defects and disorder.
Dipole oscillations of a Bose-Einstein condensate in the presence of defects and disorder.
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DOI：
10.1103/physrevlett.100.250405
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发表时间：
2008-03
影响因子：
8.6
通讯作者：
M. Albert;T. Paul;N. Pavloff;P. Leboeuf
中科院分区：
文献类型：
--
作者：
M. Albert;T. Paul;N. Pavloff;P. Leboeuf
我们考虑了在散射势存在的情况下，被困的稀玻色-爱因斯坦凝聚体的偶极振荡，散射势包括局域缺陷势和扩展无序势。在这两种情况下的超流性和阻尼的振荡的打破示出相关的外观的非线性耗散流。在超音速时，流动变成渐近无耗散的.
We consider dipole oscillations of a trapped dilute Bose-Einstein condensate in the presence of a scattering potential consisting either in a localized defect or in an extended disordered potential. In both cases the breaking of superfluidity and the damping of the oscillations are shown to be related to the appearance of a nonlinear dissipative flow. At supersonic velocities the flow becomes asymptotically dissipationless.