Generic equilibration dynamics of planar defects in trapped atomic superfluids

Peter Scherpelz, Karmela Padavić, Andy Murray, Andreas Glatz, Igor S. Aranson, K. Levin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We investigate equilibration processes shortly after sudden perturbations are applied to ultracold trapped superfluids. We show the similarity of phase imprinting and localized density depletion perturbations, both of which initially are found to produce "phase walls." These planar defects are associated with a sharp gradient in the phase. Importantly they relax following a quite general sequence. Our studies, based on simulations of the complex time-dependent Ginzburg-Landau equation, address the challenge posed by these experiments: how a superfluid eventually eliminates a spatially extended planar defect. The processes involved are necessarily more complex than equilibration involving simpler line vortices. An essential mechanism for relaxation involves repeated formation and loss of vortex rings near the trap edge.

Original languageEnglish (US)
Article number033621
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume91
Issue number3
DOIs
StatePublished - Mar 18 2015

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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