학술논문
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EPJ Web of Conferences . 2018, Vol. 191, p1-9. 9p.
Cosmological bounce in Horndeski theory and beyond.
Document Type
Article
Author
Source
Subject
*GENERAL relativity (Physics)
*METAPHYSICAL cosmology
*SCALAR field theory
*ALGEBRAIC field theory
*LAGRANGIAN functions
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Language
ISSN
2101-6275
Abstract
We discuss the stability of the classical bouncing solutions in the general Horndeski theory and beyond Horndeski theory. We restate the no-go theorem, showing that in the general Horndeski theory there are no spatially flat non-singular cosmological solutions which are stable during entire evolution. We show the way to evade the no-go in beyond Horndeski theory and give two specific examples of bouncing solutions, whose asymptotic past and future or both are described by General Relativity (GR) with a conventional massless scalar field. Both solutions are free of any pathologies at all times. [ABSTRACT FROM AUTHOR]