Anisotropic Inflation from Vector Impurity

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dc.creatorKanno, Sugumi
dc.creatorKimura, Masashi
dc.creatorSoda, Jiro
dc.creatorYokoyama, Shuichiro
dc.date2008-06-15
dc.date2008-08-01
dc.date.accessioned2026-07-07T11:51:40Z
dc.date.available2026-07-07T11:51:40Z
dc.descriptionWe study an inflationary scenario with a vector impurity. We show that the universe undergoes anisotropic inflationary expansion due to a preferred direction determined by the vector. Using the slow-roll approximation, we find a formula to determine anisotropy of the inflationary universe. We discuss possible observable predictions of this scenario. In particular, it is stressed that primordial gravitational waves can be induced from curvature perturbations. Hence, even in low scale inflation, a sizable amount of primordial gravitational waves may be produced during inflation.
dc.description16 pages, 4 figures, improved section V, to be published in JCAP
dc.identifierhttps://arxiv.org/abs/0806.2422
dc.identifierhttp://arxiv.org/abs/0806.2422
dc.identifierJCAP0808:034,2008
dc.identifierdoi:10.1088/1475-7516/2008/08/034
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203978
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleAnisotropic Inflation from Vector Impurity
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