超流turbulence的准经典和超量子衰变
Quasiclassical and ultraquantum decay of superfluid turbulence
摘要：
这封信解决了一个问题，经过长达十年的讨论，仍然是开放的：什么是量子湍流衰变的超量子制度的性质？在这项工作中开发的模型再现超量子和准经典衰变制度，并解释其流体力学性质。在湍流是通过在某一中间长度尺度上强迫产生的情况下，例如通过Walmsley和Golov [Phys. Rev. Lett. { \bf 100}，245301（2008）]，我们解释了超量子和准经典机制的产生机制。我们还发现，梁的各向异性是重要的产生与准经典制度的大尺度运动。
英文摘要：
This letter addresses the question which, after a decade-long discussion, still remains open: what is the nature of the ultraquantum regime of decay of quantum turbulence? The model developed in this work reproduces both the ultraquantum and the quasiclassical decay regimes and explains their hydrodynamical natures. In the case where turbulence is generated by forcing at some intermediate lengthscale, e.g. by the beam of vortex rings in the experiment of Walmsley and Golov [Phys. Rev. Lett. {\bf 100}, 245301 (2008)], we explained the mechanisms of generation of both ultraquantum and quasiclassical regimes. We also found that the anisotropy of the beam is important for generating the large scale motion associated with the quasiclassical regime.
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