Irreversible dynamics of vortex reconnections in quantum fluids

Villois, Alberto, Proment, Davide and Krstulovic, Giorgio (2020) Irreversible dynamics of vortex reconnections in quantum fluids. Physical Review Letters, 125. ISSN 0031-9007

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We statistically study vortex reconnections in quantum fluids by evolving different realizations of vortex Hopf links using the Gross-Pitaevskii model. Despite the time reversibility of the model, we report clear evidence that the dynamics of the reconnection process is time irreversible, as reconnecting vortices tend to separate faster than they approach. Thanks to a matching theory devised concurrently by Proment and Krstulovic [Phys. Rev. Fluids 5, 104701 (2020)PLFHBR2469-990X10.1103/PhysRevFluids.5.104701], we quantitatively relate the origin of this asymmetry to the generation of a sound pulse after the reconnection event. Our results have the prospect of being tested in several quantum fluid experiments and, theoretically, may shed new light on the energy transfer mechanisms in both classical and quantum turbulent fluids.

Item Type: Article
Uncontrolled Keywords: cond-mat.other,,physics.flu-dyn,physics and astronomy(all) ,/dk/atira/pure/subjectarea/asjc/3100
Faculty \ School: Faculty of Science > School of Mathematics
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Depositing User: LivePure Connector
Date Deposited: 05 Oct 2020 23:58
Last Modified: 22 Oct 2021 01:41
DOI: 10.1103/PhysRevLett.125.164501

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