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The general solution at large scale for second order perturbations in a scalar field dominated universe
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics (from 2013). Karlstad Univ, Dept Phys, S-65188 Karlstad, Sweden..ORCID iD: 0000-0002-0906-8808
Univ Waterloo, Dept Appl Math, Waterloo, ON N2L 3G1, Canada..
2019 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 6, article id 021Article in journal (Refereed) Published
Abstract [en]

In this paper we consider second order perturbations of a flat Friedmann-Lemaitre universe whose stress-energy content is a single minimally coupled scalar field with an arbitrary potential. We derive the general solution of the perturbed Einstein equations in explicit form for this class of models when the perturbations are in the super-horizon regime. As a by-product we obtain a new conserved quantity for long wavelength perturbations of a single scalar field at second order.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2019. no 6, article id 021
Keywords [en]
cosmological perturbation theory, inflation
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-73320DOI: 10.1088/1475-7516/2019/06/021ISI: 000471172400002OAI: oai:DiVA.org:kau-73320DiVA, id: diva2:1333942
Available from: 2019-07-02 Created: 2019-07-02 Last updated: 2019-07-02Bibliographically approved

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Uggla, Claes

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