TY - JOUR
T1 - Breaking the scale invariance of the primordial power spectrum in Hořava-Lifshitz cosmology
AU - Yamamoto, Kazuhiro
AU - Kobayashi, Tsutomu
AU - Nakamura, Gen
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/9/9
Y1 - 2009/9/9
N2 - We study the spectral tilt of primordial perturbations in Hořava-Lifshitz cosmology. The uniform approximation, which is a generalization of the familiar Wentzel-Kramers-Brillouin method, is employed to compute the spectral index both numerically and analytically in a closed form. We clarify how the spectral index depends on the inflation model and parameters in the modified dispersion relation.
AB - We study the spectral tilt of primordial perturbations in Hořava-Lifshitz cosmology. The uniform approximation, which is a generalization of the familiar Wentzel-Kramers-Brillouin method, is employed to compute the spectral index both numerically and analytically in a closed form. We clarify how the spectral index depends on the inflation model and parameters in the modified dispersion relation.
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U2 - 10.1103/PhysRevD.80.063514
DO - 10.1103/PhysRevD.80.063514
M3 - Article
AN - SCOPUS:70349863002
SN - 1550-7998
VL - 80
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 6
M1 - 063514
ER -