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Article
Non-isotropy of the CMB power spectrum in single field inflation
Physical Review D (2009)
  • John Donoghue, University of Massachusetts - Amherst
  • Koushik Dutta
  • Andreas Ross
Abstract
Contaldi et al. [1] 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 multipoles. We investigate the nature of this asymmetry and comment on its relation to possible anomalies at low multipoles.
Disciplines
Publication Date
July 28, 2009
Publisher Statement
DOI: 10.1103/PhysRevD.80.023526
Citation Information
John Donoghue, Koushik Dutta and Andreas Ross. "Non-isotropy of the CMB power spectrum in single field inflation" Physical Review D Vol. 80 (2009)
Available at: http://works.bepress.com/john_donoghue/148/