TY - JOUR
T1 - Second-order corrections to the power spectrum in the slow-roll expansion with a time-dependent sound speed
AU - Wei, Hao
AU - Cai, Rong Gen
AU - Wang, Anzhong
PY - 2004/12/9
Y1 - 2004/12/9
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/8444241589
U2 - 10.1016/j.physletb.2004.10.034
DO - 10.1016/j.physletb.2004.10.034
M3 - Article
AN - SCOPUS:8444241589
SN - 0370-2693
VL - 603
SP - 95
EP - 106
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -