Implementation of two-field inflation for cosmic linear anisotropy solving system

We outline the modifications in the numerical Boltzmann code Cosmic Linear Anisotropy Solving System (CLASS) in order to include extra inflationary fields. The functioning of the code is first described, how and where modifications are meant to be done are later explained. In the present study, we f...

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Published inarXiv.org
Main Authors Morales-Martínez, Braulio, Arciniega, Gustavo, Jaime, Luisa G, Piccinelli, Gabriella
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 25.04.2021
Subjects
Anisotropy
Mathematical analysis
Physics - Cosmology and Nongalactic Astrophysics
Physics - High Energy Physics - Theory
Polynomials
Runge-Kutta method
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Summary:We outline the modifications in the numerical Boltzmann code Cosmic Linear Anisotropy Solving System (CLASS) in order to include extra inflationary fields. The functioning of the code is first described, how and where modifications are meant to be done are later explained. In the present study, we focus on the modifications needed for the implementation of a two-field inflationary model, with canonical kinetic terms and a polynomial potential with no cross terms, presenting preliminary results for the effect of the second field on the spectra. The adaptability of the code is exploited, making use of the classes and structures of C and the generic Runge-Kutta integration tool provided by the program.
ISSN:2331-8422
DOI:10.48550/arxiv.2105.09747