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

authored by

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

Abstract

The 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.

External Organisation(s)

Center of Applied Space Technology and Microgravity (ZARM)

Type

Article

Journal

European Physical Journal C

Volume

83

ISSN

1434-6044

Publication date

06.03.2023

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Engineering (miscellaneous), Physics and Astronomy (miscellaneous)

Electronic version(s)

https://doi.org/10.1140/epjc/s10052-023-11322-3 (Access: Open)