Work

Linear perturbations and stability analysis in f(T) Braneworld scenario

Year: 2024

Type: article

Abstract: We conduct a detailed analysis of the full linear perturbations in the braneworld scenario within f ( T ) gravity. By decomposing the perturbations of the theory into the scalar, transverse vector, antisymmetric pseudotensor, and symmetric transverse-traceless tensor modes, we derive the quadratic action for each mode. The results indicate that there is a total of one scalar, one massless vector, and one tensor propagating degrees of freedom. Consequently, in comparison to general relativity, no additional degrees of freedom appear under the flat braneworld background in the linearized theory. For a thick brane model with f ( T ) = T + α T 2 , we find that it exhibits stability against linear perturbations.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2024.139161

Authors: Ju-Ying Zhao, Mao-Jiang Liu, Ke Yang

Institution: Southwest University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, Natural Science Foundation of Chongqing, Centre Scientifique et Technique du Bâtiment

Awards: G1189856357, G1772606524, G3128211953, G504305494