Gravitational perturbations from oscillons and transients after inflation

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dc.citation.articleNumber123504en_US
dc.citation.issueNumber12en_US
dc.citation.journalTitlePhysical Review Den_US
dc.citation.volumeNumber99en_US
dc.contributor.authorLozanov, Kaloian D.en_US
dc.contributor.authorAmin, Mustafa A.en_US
dc.date.accessioned2019-08-28T17:01:31Zen_US
dc.date.available2019-08-28T17:01:31Zen_US
dc.date.issued2019en_US
dc.description.abstractWe study the scalar and tensor perturbations generated by the fragmentation of the inflaton condensate into oscillons or transients after inflation, using nonlinear classical lattice simulations. Without including the backreaction of metric perturbations, we find that the magnitude of scalar metric perturbations never exceeds a few ×10−3, whereas the maximal strength of the gravitational wave signal today is O(10−9) for standard postinflationary expansion histories. We provide parameter scalings for the α-attractor models of inflation, which can be easily applied to other models. We also discuss the likelihood of primordial black hole formation, as well as conditions under which the gravitational wave signal can be at observationally interesting frequencies and amplitudes. Finally, we provide an upper bound on the frequency of the peak of the gravitational wave signal, which applies to all preheating scenarios.en_US
dc.identifier.citationLozanov, Kaloian D. and Amin, Mustafa A.. "Gravitational perturbations from oscillons and transients after inflation." <i>Physical Review D,</i> 99, no. 12 (2019) American Physical Society: https://doi.org/10.1103/PhysRevD.99.123504.en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.99.123504en_US
dc.identifier.urihttps://hdl.handle.net/1911/107376en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleGravitational perturbations from oscillons and transients after inflationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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