Synthetic flux attachment

Valentí-Rojas, G., Westerberg, N. and Öhberg, P. (2020) Synthetic flux attachment. Physical Review Research, 2, 033453. (doi: 10.1103/PhysRevResearch.2.033453)

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Topological field theories emerge at low energy in strongly correlated condensed matter systems and appear in the context of planar gravity. In particular, the study of Chern-Simons terms gives rise to the concept of flux attachment when the gauge field is coupled to matter, yielding flux-charge composites. We investigate the generation of flux attachment in a Bose-Einstein condensate in the presence of nonlinear synthetic gauge potentials. In doing so, we identify the U (1) Chern-Simons gauge field as a singular density-dependent gauge potential, which in turn can be expressed as a Berry connection. We envisage a proof-of-concept scheme where the artificial gauge field is perturbatively induced by an effective light-matter detuning created by interparticle interactions. At a mean field level, we recover the action of a “charged” superfluid minimally coupled to both a background and a Chern-Simons gauge field. Remarkably, a localized density perturbation in combination with a nonlinear gauge potential gives rise to an effective composite boson model of fractional quantum Hall effect, displaying anyonic vortices.

Item Type:Articles
Additional Information:G.V.-R. acknowledges financial support from EPSRC CMCDT Grant No. EP/L015110/1. N.W. acknowledges funding from the UK Engineering and Physical Sciences Research Council under Grant No. EP/R513222/1, as well as CM-CDT Grant No. EP/L015110/1.
Glasgow Author(s) Enlighten ID:Westerberg, Dr Niclas
Authors: Valentí-Rojas, G., Westerberg, N., and Öhberg, P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Research
Publisher:American Physical Society
ISSN (Online):2643-1564
Published Online:21 September 2020
Copyright Holders:Copyright © 2020 The Authors
First Published:First published in Physical Review Research 2: 033453
Publisher Policy:Reproduced under a Creative Commons licence

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
305200DTP 2018-19 University of GlasgowMary Beth KneafseyEngineering and Physical Sciences Research Council (EPSRC)EP/R513222/1MVLS - Graduate School