Primordial fluctuations from nonlinear couplings

Esteban A. Calzetta and Sonia Gonorazky
Phys. Rev. D 55, 1812 – Published 15 February 1997
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Abstract

We study the spectrum of primordial fluctuations in theories where the inflaton field is nonlinearly coupled to massless fields and/or to itself. Conformally invariant theories generically predict a scale-invariant spectrum. Scales entering the theory through infrared divergences cause logarithmic corrections to the spectrum, tilting it towards the blue. We discuss in some detail whether these fluctuations are quantum or classical in nature.

  • Received 26 August 1996

DOI:https://doi.org/10.1103/PhysRevD.55.1812

©1997 American Physical Society

Authors & Affiliations

Esteban A. Calzetta and Sonia Gonorazky

  • Instituto de Astronomía y Física del Espacio (IAFE), Casilla de Correo 67, suc 28, (1428) Buenos Aires, Argentina
  • Departamento de Física, Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Universitaria, (1428) Buenos Aires, Argentina

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Issue

Vol. 55, Iss. 4 — 15 February 1997

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