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False vacuum decay in an ultracold spin-1 Bose gas

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arxiv 2108.05740 v2 pith:BM5TAZXL submitted 2021-08-12 cond-mat.quant-gas hep-th

Thomas P. Billam , Kate Brown , Ian G. Moss This is my paper · ORCID
classification cond-mat.quant-gashep-th
keywords decayvacuumbosecouplingfalsespin-1statessystem
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abstract

We propose an ultracold atom analogue of early universe 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 coupling 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 its false vacuum. We examine the dependence of the rate of vacuum decay on particle density for $^{7}$Li and $^{41}$K and find reasonable agreement with instanton methods.

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Cited by 4 Pith papers

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