Erratum: Statistical anisotropy in the inflationary universe

Details Erratum: Statistical anisotropy in the inflationary universe Erratum: Statistical anisotropy in the inflationary universe

2009-04-12

arxiv.org/abs/0904.1887v4

Phys.Rev.D80:023521,2009; Erratum-ibid.D83:069904,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

2 pages, Erratum to the paper, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.80.023521 10.11

An error was made when calculating the amplitude of the perturbed scalar mode after Hubble-radius crossing. When corrected, it eliminates the leading term in the statistical anisotropy of the power spectrum, reducing it from the previously claimed upper estimate of $\lesssim 10^{-2}$ to the level of at most $10^{-6}$, which is beyond the possibility of detection. The general conclusion is that a single-field inflationary scenario cannot produce statistical anisotropy of appreciable magnitude.

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