False vacuum decay in an ultracold spin-1 Bose gas
| Autor: | Billam, Thomas P., Brown, Kate, Moss, Ian G. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.105.L041301 |
| Popis: | 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. Comment: 5 pages, 5 figures v2: changes to the text and figures, new licence |
| Databáze: | arXiv |
| Externí odkaz: |
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