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

doi:10.1016/j.physletb.2004.10.034

Second-order corrections to the power spectrum in the slow-roll expansion with a time-dependent sound speed

Hao Wei, Rong-Gen Cai + Show 1 more

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https://doi.org/10.1016/j.physletb.2004.10.034

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Journal: Physics Letters B	Publication Date: Oct 27, 2004
Citations: 23	License type: cc-by

Affiliation: Baylor University

#Slow-roll Expansion #Green's Function Method + Show 8 more

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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.

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