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Physics of ultra cold atoms and their applications
Structure of a chaotic tangle of quantum vortices in turbulent superfluid liquids and in a Bose – Einstein condensate
S. K. Nemirovskii S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences, Novosibirsk
Abstract:
Based on the theory of the thermodynamic equilibrium in a system of quantum vortices in superfluid liquids and in a Bose – Einstein condensate in the presence of a counterflow of normal and superfluid components, we investigate the structure of a chaotic tangle of quantum vortices in turbulent superfluid liquids. Using the characteristic functional method, the properties of hydrodynamic vortex filaments are examined. It is shown that the average curvature of the vortex lines is on the order of the intervortex distance, with the proportionality coefficient being independent of the counterflow velocity. It is found that the degree of anisotropy of the vortex loops does not depend on the applied counterflow velocity. The obtained results explain the origin of the anisotropy as well as the relationship between the curvature of the lines and the intervortex space and their dependence on the parameters of the problem.
Keywords:
Bose – Einstein condensate, quantum vortices, superfluid turbulence, topological defects.
Received: 11.03.2020 Revised: 02.04.2020
Citation:
S. K. Nemirovskii, “Structure of a chaotic tangle of quantum vortices in turbulent superfluid liquids and in a Bose – Einstein condensate”, Kvantovaya Elektronika, 50:6 (2020), 556–560 [Quantum Electron., 50:6 (2020), 556–560]
Linking options:
https://www.mathnet.ru/eng/qe17270 https://www.mathnet.ru/eng/qe/v50/i6/p556
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Abstract page: | 109 | Full-text PDF : | 22 | References: | 20 | First page: | 2 |
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