Non-Gaussianity in Nonminimally Coupled Scalar Field Theory

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dc.creatorKoh, Seoktae
dc.date2005-10-03
dc.date2005-12-12
dc.date.accessioned2026-07-07T07:48:33Z
dc.date.available2026-07-07T07:48:33Z
dc.descriptionWe consider the non-Gaussianity of the nonlinear density perturbations in a single-field inflationary model when a scalar field couples nonminimally with gravity. Gravity theories with a nonminimal coupling can be transformed into the Einstein gravity with canonical kinetic terms by using a suitable conformal transformation. We find that a nonlinear generalization of the gauge invariant quantity $ζ_i$ is invariant under the conformal transformation. With the help of this conformal invariant property, we calculate the non-Gaussianity, which is characterized by a nonlinear parameter $f_{NL}$, in nonminimal coupled scalar field theory.
dc.description4pages, talk at the 9th Italian-Korean Symposium on Relativistic Astrophysics, Seoul and Mt. Kumkang, Korea,19-24 July 2005; corrected typos
dc.identifierhttps://arxiv.org/abs/astro-ph/0510030
dc.identifierhttp://arxiv.org/abs/astro-ph/0510030
dc.identifierJ.Korean Phys.Soc. 49 (2006) S787-S790
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124539
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleNon-Gaussianity in Nonminimally Coupled Scalar Field Theory
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