Chaotic new inflation and primordial spectrum of adiabatic fluctuations

Details Chaotic new inflation and primordial spectrum of adiabatic fluctuations Chaotic new inflation and primordial spectrum of adiabatic fluctuations

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phrvd..59j7303y&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 59, Issue 10, 15 May 1999, id. 107303

Physics

39

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

Scientific paper

In a number of scalar potentials with an unstable local maximum at the origin, chaotic inflation is followed by new inflation if model parameters of the potential are appropriately chosen. We calculate the spectrum of adiabatic fluctuations in such a double inflation model and show that it is possible to realize an almost scale-invariant spectrum with a sharp cutoff on a superhorizon scale, which may be favored observationally, and a tilted spectrum with the spectral index neff<0.95 on large scales.

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