Phys. Rev. D 80, 063514 (2009) [5 pages]Breaking the scale invariance of the primordial power spectrum in Hořava-Lifshitz cosmologyReceived 9 July 2009; published 9 September 2009 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.80.063514
DOI:
10.1103/PhysRevD.80.063514
PACS:
98.80.Cq
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.