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Persistent current formation in double-ring geometries

Lookup NU author(s): Dr Tom Bland, Quentin Marolleau, Dr Paolo Comaron, Professor Boris Malomed, Professor Nikolaos ProukakisORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2020 The Author(s). Published by IOP Publishing Ltd.Quenching an ultracold bosonic gas in a ring across the Bose-Einstein condensation phase transition is known, and has been experimentally observed, to lead to the spontaneous emergence of persistent currents. The present work examines how these phenomena generalize to a system of two experimentally accessible explicitly two-dimensional co-planar rings with a common interface, or to the related lemniscate geometry, and demonstrates an emerging independence of winding numbers across the rings, which can exhibit flow both in the same and in opposite directions. The observed persistence of such findings in the presence of dissipative coupled evolution due to the local character of the domain formation across the phase transition and topological protection of the randomly emerging winding numbers should be within current experimental reach.

Publication metadata

Author(s): Bland T, Marolleau Q, Comaron P, Malomed BA, Proukakis NP

Publication type: Article

Publication status: Published

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Year: 2020

Volume: 53

Issue: 11

Print publication date: 14/06/2020

Online publication date: 12/05/2020

Acceptance date: 20/03/2020

Date deposited: 13/06/2020

ISSN (print): 0953-4075

ISSN (electronic): 1361-6455

Publisher: Institute of Physics Publishing


DOI: 10.1088/1361-6455/ab81e9


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