Publication Date

2009

Journal or Book Title

PHYSICAL REVIEW D

Abstract

Contaldi et al. [C. R. Contaldi, M. Peloso, L. Kofman, and A. Linde, J. Cosmol. Astropart. Phys. 07 (2003) 002] have suggested that an initial period of kinetic energy domination in single field inflation may explain the lack of CMB power at large angular scales. We note that in this situation it is natural that there also be a spatial gradient in the initial value of the inflaton field, and that this can provide a spatial asymmetry in the observed CMB power spectrum, manifest at low values of ℓ. We investigate the nature of this asymmetry and comment on its relation to possible anomalies at low ℓ.

Comments

This is the pre-published version which is collected from arXiv. The published version is at http://prd.aps.org/abstract/PRD/v80/i2/e023526

Volume

80

Pages

-

Issue

2

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