Wave turbulence in quantum fluids

Autor: Sergey Nazarenko, Peter V. E. McClintock, German V. Kolmakov
Rok vydání: 2014
Předmět:
Zdroj: Proceedings of the National Academy of Sciences. 111:4727-4734
ISSN: 1091-6490
0027-8424
DOI: 10.1073/pnas.1312575110
Popis: Wave turbulence (WT) occurs in systems of strongly interacting nonlinear waves and can lead to energy flows across length and frequency scales much like those that are well known in vortex turbulence. Typically, the energy passes although a nondissipative inertial range until it reaches a small enough scale that viscosity becomes important and terminates the cascade by dissipating the energy as heat. Wave turbulence in quantum fluids is of particular interest, partly because revealing experiments can be performed on a laboratory scale, and partly because WT among the Kelvin waves on quantized vortices is believed to play a crucial role in the final stages of the decay of (vortex) quantum turbulence. In this short review, we provide a perspective on recent work on WT in quantum fluids, setting it in context and discussing the outlook for the next few years. We outline the theory, review briefly the experiments carried out to date using liquid H 2 and liquid 4 He, and discuss some nonequilibrium excitonic superfluids in which WT has been predicted but not yet observed experimentally. By way of conclusion, we consider the medium- and longer-term outlook for the field.
Databáze: OpenAIRE
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