Perturbations in non-flat cosmology for f(T) gravity

Author:

Bahamonde Sebastian,Dialektopoulos Konstantinos F.,Hohmann Manuel,Said Jackson Levi,Pfeifer Christian,Saridakis Emmanuel N.

Abstract

AbstractThe study of cosmological perturbation theory in f(T) gravity is a topic of great interest in teleparallel gravity since this is one of the simplest generalizations of the theory that modifies the teleparallel equivalent of general relativity. In this work, we explore the possibility of a non-flat FLRW background solution and perform perturbations for positively as well as negatively curved spatial geometries, together with a comparison to the flat case. We determine the generalized behaviour of the perturbative modes for this non-flat FLRW setting for arbitrary f(T) models, when the most general homogeneous and isotropic background tetrads are used. We also identify propagating modes in this setup, and relate this with the case of a flat cosmology.

Funder

Nazarbayev University

Eesti Teadusagentuur

Hellenic Foundation for Research and Innovation

European Regional Development Fund

Japan Society for the Promotion of Science

Deutsche Forschungsgemeinschaft

Publisher

Springer Science and Business Media LLC

Subject

Physics and Astronomy (miscellaneous),Engineering (miscellaneous)

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