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Gauge-invariant perturbations at second order: multiple scalar fields on large scales

Malik, Karim A. (2005) Gauge-invariant perturbations at second order: multiple scalar fields on large scales. Journal of Cosmology and Astroparticle Physics, 0511. 005. ISSN 1475-7516

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Abstract

We derive the governing equations for multiple scalar fields minimally coupled to gravity in a flat Friedmann–Robertson–Walker background spacetime on large scales. We include scalar perturbations up to second order and write the equations in terms of physically transparent gauge-invariant variables at first and second order. This allows us to write the perturbed Klein–Gordon equation at second order solely in terms of the field fluctuations on flat slices at first and second order.

Item Type: Article
Journal or Publication Title: Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords: cosmological perturbation theory ; inflation
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 9657
Deposited By: Ms Margaret Calder
Deposited On: 18 Jun 2008 13:57
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:40
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/9657

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