Non-Gaussian perturbations from inflationary dynamics

Details Non-Gaussian perturbations from inflationary dynamics Non-Gaussian perturbations from inflationary dynamics

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvd..38..465o&link_type=abstract

Physical Review D (Particles and Fields), Volume 38, Issue 2, 15 July 1988, pp.465-471

Physics

39

Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

The dynamics of the scalar field driving inflation can be described as a Brownian motion under the influence of a classical force arising from its self-interactions. Fluctuations of the inflaton on large scales give rise to density perturbations. If the inflaton potential is not too flat, as in models of nonexponential inflation, these perturbations can be non-Gaussian. In a power-law inflation with an exponential potential non-Gaussian scale-invariant adiabatic perturbations are rapidly produced.

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