Cosmological perturbations from inhomogeneous preheating and multi-field trapping

Simple item page
dc.creatorMatsuda, Tomohiro
dc.date2007-07-04
dc.date2007-07-11
dc.date.accessioned2026-07-07T10:36:15Z
dc.date.available2026-07-07T10:36:15Z
dc.descriptionWe consider inhomogeneous preheating in a multi-field trapping model. The curvature perturbation is generated by inhomogeneous preheating which induces multi-field trapping at the enhanced symmetric point (ESP), and results in fluctuation in the number of e-foldings. Instead of considering simple reheating after preheating, we consider a scenario of shoulder inflation induced by the trapping. The fluctuation in the number of e-foldings is generated during this weak inflationary period, when the additional light scalar field is trapped at the local maximum of its potential. The situation may look similar to locked or thermal inflation or even to hybrid inflation, but we will show that the present mechanism of generating the curvature perturbation is very different from these others. Unlike the conventional trapped inflationary scenario, we do not make the assumption that an ESP appears at some unstable point on the inflaton potential. This assumption is crucial in the original scenario, but it is not important in the multi-field model. We also discuss inhomogeneous preheating at late-time oscillation, in which the magnitude of the curvature fluctuation can be enhanced to accommodate low inflationary scale.
dc.description18pages, 2 figures, to appear in JHEP
dc.identifierhttps://arxiv.org/abs/0707.0543
dc.identifierhttp://arxiv.org/abs/0707.0543
dc.identifierJHEP0707:035,2007
dc.identifierdoi:10.1088/1126-6708/2007/07/035
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179989
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCosmological perturbations from inhomogeneous preheating and multi-field trapping
dc.typetext

Files

Collections

arXiv