Universal and nonuniversal aspects of vortex reconnections in superfluids

Alberto Villois (Lead Author), Davide Proment, Giorgio Krstulovic

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46 Citations (Scopus)
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Insight into vortex reconnections in superfluids is presented, making use of analytical results and numerical simulations of the Gross-Pitaevskii model. Universal aspects of the reconnection process are investigated by considering different initial vortex configurations and making use of a recently developed tracking algorithm to reconstruct the vortex filaments. We show that during a reconnection event the vortex lines approach and separate always according to the time scaling $ \delta \sim t^{1/2} $ with prefactors that depend on the vortex configuration. We also investigate the behavior of curvature and torsion close to the reconnection point, demonstrating analytically that the curvature can exhibit a self-similar behavior that might be broken by the development of shocklike structures in the torsion.
Original languageEnglish
Article number044701
JournalPhysical Review Fluids
Issue number4
Publication statusPublished - 4 Apr 2017

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