Vinen turbulence via the decay of multicharged vortices in trapped atomic Bose-Einstein condensates
Vinen turbulence via the decay of multicharged vortices in trapped atomic Bose-Einstein condensates
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被捕获的原子玻色-爱因斯坦凝聚体中多电荷涡流衰变产生的维宁湍流
DOI：
10.1103/physreva.96.023617
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发表时间：
2017
影响因子：
2.9
通讯作者：
and C. F. Barenghi
中科院分区：
文献类型：
--
作者：
A. Cidrim;A. C. White;A. J. Allen;V. S. Bagnato;and C. F. Barenghi
我们研究了一种在捕获的玻色-爱因斯坦凝聚体中产生湍流的方法，该方法利用多电荷涡旋的衰变来减少表面振荡。我们展示了由此产生的单电荷涡旋相互缠绕，以螺旋开尔文波的形状缠绕在一起，它们碰撞并经历涡旋重新连接，形成无序涡旋状态。通过速度统计、能谱、相关函数和时间衰减，并将这些性质与经典湍流的性质和超流氦的观测结果进行比较，我们得出结论，这种无序涡旋状态可以与超流氦中发现的维宁湍流状态相识别。
We investigate a procedure to generate turbulence in a trapped Bose-Einstein condensate which takes advantage of the decay of multicharged vortices to reduce surface oscillations. We show that the resulting singly charged vortices twist around each other, intertwined in the shape of helical Kelvin waves, which collide and undergo vortex reconnections, creating a disordered vortex state. By examining the velocity statistics, the energy spectrum, the correlation functions, and the temporal decay and comparing these properties with the properties of classical turbulence and observations in superfluid helium, we conclude that this disordered vortex state can be identified with the Vinen regime of turbulence which has been discovered in the context of superfluid helium.