Breaking the scale invariance of the primordial power spectrum in Horava-Lifshitz Cosmology

Details Breaking the scale invariance of the primordial power spectrum in Horava-Lifshitz Cosmology Breaking the scale invariance of the primordial power spectrum in Horava-Lifshitz Cosmology

2009-07-09

arxiv.org/abs/0907.1549v2

Phys.Rev.D80:063514,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 2 figures, accepted for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.80.063514

We study the spectral tilt of primordial perturbations in Horava-Lifshitz cosmology. The uniform approximation, which is a generalization of the familiar Wentzel-Kramers-Brillouin (WKB) 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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