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https://www.um.edu.mt/library/oar/handle/123456789/89081
Title: | Stability of the flat FLRW metric in f (T) gravity |
Authors: | Farrugia, Gabriel Said, Jackson |
Keywords: | General relativity (Physics) Einstein field equations Relativity (Physics) Gravitation |
Issue Date: | 2016 |
Publisher: | American Physical Society |
Citation: | Farrugia, G., & Said, J. L. (2016). Stability of the flat FLRW metric in f (T) gravity. Physical Review D, 94(12), 124054. |
Abstract: | In this paper, we investigate the stability of the flat Friedmann-Lemaitre-Robertson-Walker metric in f (T ) gravity. This is achieved by analyzing the small perturbations, δ about the Hubble parameter and the matter energy density, δm. We find that δ ∝H ˙/H and δm∝H . Since the Hubble parameter depends on the function f (T ), two models were considered (A) the power-law model f (T )=α (-T )n, and (B) the exponential model f (T )=α T0(1 -exp [-p √{T/T0}] ) , where the parameters n and p were chosen to give comparable physical results. For the parameters considered, it was found that the solutions are stable with vanishing δ and decaying then constant δm, meaning that the matter perturbations persist during late times. |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/89081 |
Appears in Collections: | Scholarly Works - InsSSA |
Files in This Item:
File | Description | Size | Format | |
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Stability_of_the_flat_FLRW_metric_in_f_T_gravity_2016.pdf Restricted Access | 800.13 kB | Adobe PDF | View/Open Request a copy |
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