Relaxation of twist helicity in the cascade process of linked quantum vortices.
Relaxation of twist helicity in the cascade process of linked quantum vortices.
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DOI：
10.1103/physreve.95.053109
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发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
S. Zuccher;Renzo L. Ricca
中科院分区：
文献类型：
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作者：
S. Zuccher;Renzo L. Ricca
通过数值求解三维 Gross-Pitaevskii 方程，我们分析了与一对相连涡环的演化和衰变相关的级联过程。该系统通过一系列重新连接而衰减，最终产生三个不相连、展开、几乎平面的涡旋环。总螺旋度最初为零，在整个过程中保持不变。从扭曲（由于初始连接）到扭曲螺旋性的逐渐转变，以及随后在进化过程中跨尺度扭曲的连续松弛，被证明是在每个单独组件上一致发生的通用机制。
By numerically solving the three-dimensional Gross-Pitaevskii equation we analyze the cascade process associated with the evolution and decay of a pair of linked vortex rings. The system decays through a series of reconnections to produce finally three unlinked, unfolded, almost planar vortex loops. Total helicity, initially zero, remains unchanged throughout the process. The gradual transfer from writhe (due to initial linking) to twist helicity, followed by a continuous relaxation of twist across scales during the evolution is shown to be a generic mechanism that consistently takes place on each individual component.