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

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

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

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Abstract

© 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

URL: https://doi.org/10.1103/PhysRevA.105.L041301

DOI: 10.1103/PhysRevA.105.L041301

ePrints DOI: 10.57711/478t-m116

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