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arXiv · 0907.1549

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

Kazuhiro Yamamoto·Tsutomu Kobayashi·Gen Nakamura
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Abstract

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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Kazuhiro Yamamoto, Tsutomu Kobayashi, Gen Nakamura. 2009-09-07. Breaking the scale invariance of the primordial power spectrum in Horava-Lifshitz Cosmology. https://doi.org/10.1103/physrevd.80.063514

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