PhysRevD.80.083524.pdf (326.79 kB)
Viable inflationary models ending with a first-order phase transition
journal contribution
posted on 2023-06-08, 00:54 authored by Marina Cortês, Andrew R LiddleWe investigate the parameter space of two-field inflation models where inflation terminates via a first-order phase transition causing nucleation of bubbles. Such models experience a tension from the need to ensure nearly scale-invariant density perturbations, while avoiding a near scale-invariant bubble size distribution which would conflict observations. We perform an exact analysis of the different regimes of the models, where the energy density of the inflaton field ranges from being negligible as compared to the vacuum energy to providing most of the energy for inflation. Despite recent microwave anisotropy results favoring a spectral index less than 1, we find that there are still viable models that end with bubble production and can match all available observations. As a by-product of our analysis, we also provide an up-to-date assessment of the viable parameter space of Linde's original second-order hybrid model across its full parameter range.
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Physical Review DExternal DOI
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8Volume
80Department affiliated with
- Physics and Astronomy Publications
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Article Number: 083524Full text available
- Yes
Peer reviewed?
- Yes
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2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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