Overcritical rotation of a trapped Bose-Einstein condensate.
Overcritical rotation of a trapped Bose-Einstein condensate.
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被捕获的玻色-爱因斯坦凝聚体的超临界旋转。
DOI：
10.1103/physrevlett.86.377
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发表时间：
2000
影响因子：
8.6
通讯作者：
S. Stringari
中科院分区：
文献类型：
--
作者：
A. Recati;F. Zambelli;S. Stringari
通过求解超流体的流体力学方程，研究了在无旋约束下，受简谐势阱约束的相互作用玻色-爱因斯坦凝聚体的旋转运动.我们指出了一个过临界分支的发生，系统可以旋转角速度大于振荡器的频率。我们表明，在各向同性捕获的情况下，系统表现出从轴对称到三轴配置的分叉，作为原子间力的结果。明确讨论了相对于偶极和四极振荡的旋转运动的动力学稳定性。
The rotational motion of an interacting Bose-Einstein condensate confined by a harmonic trap is investigated by solving the hydrodynamic equations of superfluids, with the irrotationality constraint for the velocity field. We point out the occurrence of an overcritical branch where the system can rotate with angular velocity larger than the oscillator frequencies. We show that in the case of isotropic trapping the system exhibits a bifurcation from an axisymmetric to a triaxial configuration, as a consequence of the interatomic forces. The dynamical stability of the rotational motion with respect to the dipole and quadrupole oscillations is explicitly discussed.