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Title: Generic equilibration dynamics of planar defects in trapped atomic superfluids

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.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1356656
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 91; Journal Issue: 3
Country of Publication:
United States
Language:
English

Citation Formats

Scherpelz, Peter, Padavić, Karmela, Murray, Andy, Glatz, Andreas, Aranson, Igor S., and Levin, K. Generic equilibration dynamics of planar defects in trapped atomic superfluids. United States: N. p., 2015. Web. doi:10.1103/PhysRevA.91.033621.
Scherpelz, Peter, Padavić, Karmela, Murray, Andy, Glatz, Andreas, Aranson, Igor S., & Levin, K. Generic equilibration dynamics of planar defects in trapped atomic superfluids. United States. doi:10.1103/PhysRevA.91.033621.
Scherpelz, Peter, Padavić, Karmela, Murray, Andy, Glatz, Andreas, Aranson, Igor S., and Levin, K. Sun . "Generic equilibration dynamics of planar defects in trapped atomic superfluids". United States. doi:10.1103/PhysRevA.91.033621.
@article{osti_1356656,
title = {Generic equilibration dynamics of planar defects in trapped atomic superfluids},
author = {Scherpelz, Peter and Padavić, Karmela and Murray, Andy and Glatz, Andreas and Aranson, Igor S. and Levin, K.},
abstractNote = {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.},
doi = {10.1103/PhysRevA.91.033621},
journal = {Physical Review. A},
number = 3,
volume = 91,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}