本文对E. B. Sonin,PRB v 85,104516(2012)[arXiv:1201.3188],我们发现自己严重不同意。我们用这个选项来阐明开尔文波湍流理论的一些重要问题,在E。B. Sonin的论文,特别是,在强的Vinen谱和L 'vov-Nazarenko谱的弱湍流的开尔文波之间的关系。我们还讨论了我们的明确计算的开尔文波相互作用的哈密顿量和“对称性参数”,应该解决之间的矛盾的Kozik-Svistunov和L 'vov-Nazarenko谱的弱湍流的开尔文波的作用。
英文摘要:
We comment on the paper by E. B. Sonin, PRB v 85, 104516 (2012) [arXiv:1201.3188], with which we find ourselves in serious disagreement. We use this option to shed light on some important issues of a theory of Kelvin wave turbulence, touched in E. B. Sonin's paper, in particular, on the relation between the Vinen spectrum of strong- and the L'vov-Nazarenko spectrum of weak-turbulence of Kelvin waves. We also discuss the role of our explicit calculation of the Kelvin wave interaction Hamiltonian and of the "symmetry arguments" that are supposed to resolve a contradiction between the Kozik-Svistunov and L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves.
Comment on "Superfluid turbulence from quantum Kelvin wave to classical Kolmogorov cascades" [arXiv:0905.0159] by J. Yepez, G. Vahala, L.Vahala and M. Soe
Kelvin-wave cascade and dissipation in low-temperature superfluids vortices
研究了由Gross-Pitaevskii方程驱动的量子化超流涡旋中Kelvin波的统计性质。没有人为的强迫或耗散。准确跟踪涡流位置。这一过程直接使我们能够获得凯文波占据数谱。从初始条件下的长时间积分和整体平均获得的数值数据支持[L 'vov和Nazarenko,JETP Lett 91,428(2010)]中提出的谱。惯性范围内的开尔文波模式被发现是高斯弱湍流预测所预期的。最后研究了开尔文波谱的耗散范围。在这个范围内观察到强烈的非高斯波动。
Vortex annihilation and inverse cascades in two dimensional superfluid turbulence
我们研究了二维超流湍流,采用有效的描述有效的极限超流涡的密度是参数小。在足够低的温度下,有效的描述产生逆级联与柯尔莫哥洛夫能谱$E(k) \sim k^{-5/3}$。用$N(t)$表示涡的数目作为时间的函数,我们发现,涡的湮灭率的标度类似于$\dot N \sim N^{5/3}$的状态与反级联和$\dot N \sim N^2$的层流。