Cascade of vortex loops initiated by a single reconnection of quantum vortices
Cascade of vortex loops initiated by a single reconnection of quantum vortices
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由量子涡旋的单次重新连接引发的涡旋环级联
DOI：
10.1103/physrevb.83.014515
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发表时间：
2010
影响因子：
3.7
通讯作者：
T. Lipniacki
中科院分区：
文献类型：
--
作者：
M. Kursa;K. Bajer;T. Lipniacki
我们证明了两个量子涡旋的单个重联可以导致涡旋环的级联。我们的分析包括局域感应近似、高分辨率Biot-Savart和Gross-Pitaevskii模拟。后者表明，环级联是从原子尺度开始的，环径比缠结中的特征线间距小一个数量级。在叶栅中产生的涡环可能会穿透缠绕并在边界上湮灭。这为极低温度下稀疏或中等密度的涡旋缠绕提供了一种有效的衰减机制。
We demonstrate that a single reconnection of two quantum vortices can lead to the creation of a cascade of vortex rings. Our analysis involves localized induction approximation, high-resolution Biot-Savart and Gross-Pitaevskii simulations. The latter showed that the rings cascade starts on the atomic scale, with rings diameters orders of magnitude smaller than the characteristic line spacing in the tangle. Vortex rings created in the cascades may penetrate the tangle and annihilate on the boundaries. This provides an efficient decay mechanism for sparse or moderately dense vortex tangle at very low temperatures.