Decay of homogeneous two-dimensional quantum turbulence

Decay of homogeneous two-dimensional quantum turbulence
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均匀二维量子湍流的衰变

DOI:
10.1103/physreva.97.033601
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发表时间:
2018
期刊:
影响因子:
2.9
通讯作者:
Baggaley A
Baggaley A
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Baggaley A

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我们数值模拟了大的均匀玻色-爱因斯坦凝聚体中二维量子湍流的自由衰减。大量的涡流、密度分布的均匀性以及边界的缺乏(涡流可以从冷凝物中漂移出来)将涡流-反涡流对的湮灭隔离为在湍流衰减期间减少涡流数量的唯一机制。结果清楚地表明,涡湮灭是一个四涡的过程,确认衰减lawwhereis时间,这是推断出的实验与相对较少的涡在小谐波捕获冷凝。
We numerically simulate the free decay of two-dimensional quantum turbulence in a large, homogeneous Bose-Einstein condensate. The large number of vortices, the uniformity of the density profile, and the absence of boundaries (where vortices can drift out of the condensate) isolate the annihilation of vortex-antivortex pairs as the only mechanism which reduces the number of vortices,, during the turbulence decay. The results clearly reveal that vortex annihilation is a four-vortex process, confirming the decay lawwhereis time, which was inferred from experiments with relatively few vortices in small harmonically trapped condensates.
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