Inverse energy cascade in forced two-dimensional quantum turbulence.
Inverse energy cascade in forced two-dimensional quantum turbulence.
复制标题
强制二维量子湍流中的逆能量级联。
DOI：
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发表时间：
2012
影响因子：
8.6
通讯作者：
Ashton S. Bradley
中科院分区：
文献类型：
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作者：
M. Reeves;T. Billam;B. Anderson;Ashton S. Bradley
我们在强制二维量子涡流湍流的最小模型中演示了逆能量级联。我们模拟了移动超流体的 Gross-Pitaevskii 方程，该超流体受到静止障碍物势网格的强迫和静止热云的阻尼。该强迫以几个愈合长度的规模向系统注入大量涡流能量。确定了一种强迫和阻尼机制，其中涡流能量通过与同循环涡流簇的生长相关的逆能量级联、在相当大的惯性范围内的动能谱中的柯尔莫哥洛夫标度定律以及系统尺寸尺度上的动能谱凝聚而有效地传输到大长度尺度。我们的结果提供了明确的证据，表明先前在各种经典系统中观察到的逆能量级联现象也可以在量子流体中发生。
We demonstrate an inverse energy cascade in a minimal model of forced 2D quantum vortex turbulence. We simulate the Gross-Pitaevskii equation for a moving superfluid subject to forcing by a stationary grid of obstacle potentials, and damping by a stationary thermal cloud. The forcing injects large amounts of vortex energy into the system at the scale of a few healing lengths. A regime of forcing and damping is identified where vortex energy is efficiently transported to large length scales via an inverse energy cascade associated with the growth of clusters of same-circulation vortices, a Kolmogorov scaling law in the kinetic energy spectrum over a substantial inertial range, and spectral condensation of kinetic energy at the scale of the system size. Our results provide clear evidence that the inverse energy cascade phenomenon, previously observed in a diverse range of classical systems, can also occur in quantum fluids.
影响因子：
2.9
作者：
B. Nowak;Jan Schole;D. Sexty;T. Gasenzer
通讯作者：
B. Nowak;Jan Schole;D. Sexty;T. Gasenzer
影响因子：
2.9
作者：
Jan Schole;B. Nowak;T. Gasenzer
通讯作者：
Jan Schole;B. Nowak;T. Gasenzer
影响因子：
2.9
作者：
White, Angela C.;Barenghi, Carlo F.;Proukakis, Nick P.
通讯作者：
Proukakis, Nick P.