Journal or Book Title
PHYSICAL REVIEW D
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.
Donoghue, JF; Dutta, K; and Ross, A, "Nonisotropy in the CMB power spectrum in single field inflation" (2009). PHYSICAL REVIEW D. 90.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/90