Thermal dissipation in quantum turbulence.
Thermal dissipation in quantum turbulence.
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DOI：
10.1103/physrevlett.97.145301
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发表时间：
2006-07
影响因子：
8.6
通讯作者：
Michikazu Kobayashi;M. Tsubota
中科院分区：
文献类型：
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作者：
Michikazu Kobayashi;M. Tsubota
通过求解Gross-Pitaevskii方程和Bogoliubov-de Gennes方程的耦合系统，数值研究了量子湍流中热耗散的微观机制.在低温下，所获得的耗散在大于涡核尺寸的尺度上不起作用。然而，随着温度的升高，耗散在大尺度上起作用，并且它影响涡旋动力学。我们成功地得到了稀薄玻色-爱因斯坦凝聚动力学中涡旋的相互摩擦系数随温度的变化关系。
The microscopic mechanism of thermal dissipation in quantum turbulence is numerically studied by solving the coupled system involving the Gross-Pitaevskii equation and the Bogoliubov-de Gennes equation. At low temperatures, the obtained dissipation does not work at scales greater than the vortex core size. However, as the temperature increases, dissipation works at large scales and it affects the vortex dynamics. We successfully obtain the mutual friction coefficients of the vortex in dilute Bose-Einstein condensates dynamics as functions of temperature.