Primordial fluctuations from nonlinear couplings

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 c...

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Publicado: 1997
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v55_n4_p1812_Calzetta
http://hdl.handle.net/20.500.12110/paper_15507998_v55_n4_p1812_Calzetta
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_15507998_v55_n4_p1812_Calzetta
record_format dspace
spelling paper:paper_15507998_v55_n4_p1812_Calzetta2023-06-08T16:21:37Z Primordial fluctuations from nonlinear couplings 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. © 1997 The American Physical Society. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v55_n4_p1812_Calzetta http://hdl.handle.net/20.500.12110/paper_15507998_v55_n4_p1812_Calzetta
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description 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. © 1997 The American Physical Society.
title Primordial fluctuations from nonlinear couplings
spellingShingle Primordial fluctuations from nonlinear couplings
title_short Primordial fluctuations from nonlinear couplings
title_full Primordial fluctuations from nonlinear couplings
title_fullStr Primordial fluctuations from nonlinear couplings
title_full_unstemmed Primordial fluctuations from nonlinear couplings
title_sort primordial fluctuations from nonlinear couplings
publishDate 1997
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v55_n4_p1812_Calzetta
http://hdl.handle.net/20.500.12110/paper_15507998_v55_n4_p1812_Calzetta
_version_ 1768545992628502528

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