Vortex dynamics in superfluids governed by an interacting gauge theory

Butera, S. , Valiente, M. and Öhberg, P. (2016) Vortex dynamics in superfluids governed by an interacting gauge theory. New Journal of Physics, 18(August), 085001. (doi: 10.1088/1367-2630/18/8/085001)

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We study the dynamics of a vortex in a quasi two-dimensional Bose gas consisting of light-matter coupled atoms forming two-component pseudo spins. The gas is subject to a density dependent gauge potential, hence governed by an interacting gauge theory, which stems from a collisionally induced detuning between the incident laser frequency and the atomic energy levels. This provides a back-action between the synthetic gauge potential and the matter field. A Lagrangian approach is used to derive an expression for the force acting on a vortex in such a gas. We discuss the similarities between this force and the one predicted by Iordanskii, Lifshitz and Pitaevskii when scattering between a superfluid vortex and the thermal component is taken into account.

Item Type:Articles
Additional Information:SB acknowledges support from the EPSRC CM-CDT Grant No. EP/G03673X/1, MV and PÖ acknowledge support from EPSRC EP/J001392/1 and EP/M024636/1.
Glasgow Author(s) Enlighten ID:Butera, Dr Salvatore
Authors: Butera, S., Valiente, M., and Öhberg, P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:New Journal of Physics
Publisher:IOP Publishing
ISSN (Online):1367-2630
Published Online:02 August 2016
Copyright Holders:Copyright © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
First Published:First published in New Journal of Physics 18(August): 085001
Publisher Policy:Reproduced under a Creative Commons License

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