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20 April 2024

» arxiv » hep-th/0409130

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Second-Order Corrections to the Power Spectrum in the Slow-Roll Expansion with a Time-Dependent Sound Speed
Hao Wei ; Rong-Gen Cai ; Anzhong Wang ;
Date:	14 Sep 2004
Journal:	Phys.Lett. B603 (2004) 95-106
Subject:	hep-th astro-ph gr-qc
Abstract:	We extend Green’s function method developed by Stewart and Gong to calculate the power spectrum of density perturbation in the case with a time-dependent sound speed, and explicitly give the power spectrum and spectral index up to second-order corrections in the slow-roll expansion. The case of tachyon inflation is included as a special case.
Source:	arXiv, hep-th/0409130
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