@inproceedings{b145035335b5469d974454792688ab15,
title = "The viability of potential-driven galileon inflation",
abstract = "A Galileon-like nonlinear self-interaction (∂φ)2 □φ generally leads to a enhanced friction during inflation, by which even steep potentials for the standard inflation can drive cosmic acceleration. However if the Galileon term is dominant by the end of inflation, this can affect the field oscillation during reheating and the scalar propagation speed squared c2s can be negative, which leads to the instability of small-scale perturbations. For chaotic inflation and natural inflation we clarify the parameter space in which the field oscillates coherently during reheating. Moreover we place observational constraints of the scalar spectral index ns and the tensor-to-scalar ratio r.",
keywords = "Cosmic microwave background, Cosmological perturbation theory, Inflation",
author = "Junko Ohashi and Shinji Tsujikawa",
note = "Publisher Copyright: {\textcopyright} 2015, World Scientific. All rights reserved.; 13th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation, and Relativistic Field Theories, MG13 2012 ; Conference date: 01-07-2015 Through 07-07-2015",
year = "2015",
doi = "10.1142/9789814623995_0213",
language = "English",
isbn = "9789814612142",
series = "The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012",
publisher = "World Scientific",
pages = "1522--1524",
editor = "Jantzen, {Robert T.} and Kjell Rosquist and Remo Ruffini and Remo Ruffini",
booktitle = "On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories",
address = "United States",
}