3 papers
astro-ph2005
Length of inflation and WMAP data in the case of power-law inflation
Shiro Hirai, Tomoyuki Takami
The effect of the length of inflation on the power spectra of scalar and tensor perturbations is estimated using the power-law inflation model with a scale factor of a(t) = t^q. Co…
astro-ph2004
Pre-inflation models and WMAP data
Shiro Hirai
The effect of pre-inflation physics on the power spectrum of scalar perturbations is estimated and there is a possibility that the pre-inflation physics explains the Wilkinson Micr…
hep-th2003
Effect of Pre-inflation Conditions on Scalar and Tensor Perturbations in Inflation
Shiro Hirai
The effect of the initial conditions in inflation on scalar and tensor perturbations is investigated. Formulae for the power spectra of gravitational waves and curvature perturbati…