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1982
Earlier work this paper cites.
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1982
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1988
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2014

The expected anisotropy in solid inflation

Bartolo, Nicola, Peloso, Marco, Ricciardone, Angelo et al.

Understand

Solid inflation is an effective field theory of inflation in which isotropy and homogeneity are accomplished via a specific combination of anisotropic sources (three scalar fields that individually break isotropy).

This results in specific observational signatures that are not found in standard models of inflation: a non-trivial angular dependence for the squeezed bispectrum, and a possibly long period of anisotropic inflation (to drive inflation, the "solid" must be very insensitive to any deformation, and thus background anisotropies are very slowly erased).
In this paper we compute the expected level of statistical anisotropy in the power spectrum of the curvature perturbations of this model.
To do so, we account for the classical background values of the three scalar fields that are generated on large (superhorizon) scales during inflation via a random walk sum, as the perturbation modes leave the horizon.

Built on

A. D. Linde, Phys. Lett. B 116
1982
Earlier work this paper cites.
A. A. Starobinsky, Phys. Lett. B 117
1982
Earlier work this paper cites.
A. Vilenkin and L. H. Ford, Phys. Rev. D 26
1982
Earlier work this paper cites.
R. M. Wald, Phys. Rev. D 28
1983
Earlier work this paper cites.
M. S. Turner and L. M. Widrow, Phys. Rev. D 37
1988
Earlier work this paper cites.
L. H. Ford, Phys. Rev. D 40
1989
Earlier work this paper cites.
A. D. Linde, Contemp. Concepts Phys. 5
Original
1990
Earlier work this paper cites.
B. Ratra, Astrophys. J. 391
1992
Earlier work this paper cites.
D. H. Lyth, Phys. Rev. Lett. 78
1997
Earlier work this paper cites.
A. Gruzinov, Phys. Rev. D 70
2004
Earlier work this paper cites.
D. Babich, P. Creminelli and M. Zaldarriaga, JCAP 0408
2004
Earlier work this paper cites.
C. Armendariz-Picon, JCAP 0407
2004
Earlier work this paper cites.