Breaking the scale invariance of the primordial power spectrum in Hořava-Lifshitz cosmology

Kazuhiro Yamamoto, Tsutomu Kobayashi, Gen Nakamura

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number063514
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume80
Issue number6
DOIs
Publication statusPublished - Sep 9 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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