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False-vacuum decay in an ultracold spin-1 Bose gas

Lookup NU author(s): Dr Thomas BillamORCiD, Kate Brown, Professor Ian MossORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Physical Society, 2022.

For re-use rights please refer to the publisher's terms and conditions.


© 2022 American Physical Society. We propose an ultracold atom analog of false-vacuum decay using all three states of a spin-1 Bose gas. We consider a one-dimensional system with both radio-frequency and optical Raman couplings between internal states. An advantage of our proposal is the lack of a time-modulated coupling, which can lead to instabilities. Within the elaborate phase structure of the system, we identify an effective Klein-Gordon field and use Gross-Pitaevskii simulations within the truncated Wigner approximation to model the decay of a metastable state. We examine the dependence of the rate of vacuum decay on particle density for Li7 and K41 and find reasonable agreement with instanton methods.

Publication metadata

Author(s): Billam TP, Brown K, Moss IG

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2022

Volume: 105

Issue: 4

Online publication date: 11/04/2022

Acceptance date: 20/01/2022

Date deposited: 18/05/2022

ISSN (print): 2469-9926

ISSN (electronic): 2469-9934

Publisher: American Physical Society


DOI: 10.1103/PhysRevA.105.L041301

ePrints DOI: 10.57711/478t-m116


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