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Title: | Ghost and Laplacian instabilities in teleparallel Horndeski gravity |
Authors: | Capozziello, Salvatore Caruana, Maria Said, Jackson Sultana, Joseph |
Keywords: | Gravitation General relativity (Physics) Stability Gravitational fields Cosmology -- Mathematical models Perturbation (Astronomy) Gravitational waves Gravity |
Issue Date: | 2023 |
Publisher: | Institute of Physics Publishing Ltd. |
Citation: | Capozziello, S., Caruana, M., Said, J. L., & Sultana, J. (2023). Ghost and Laplacian instabilities in teleparallel Horndeski gravity. Journal of Cosmology and Astroparticle Physics, 2023(03), 060. |
Abstract: | Teleparallel geometry offers a platform on which to build up theories of gravity where torsion rather than curvature mediates gravitational interaction. The teleparallel analogue of Horndeski gravity is an approach to teleparallel geometry where scalar-tensor theories are considered in this torsional framework. Teleparallel gravity is based on the tetrad formalism. This turns out to result in a more general formalism of Horndeski gravity. In other words, the class of teleparallel Horndeski gravity models is much broader than the standard metric one. In this work, we explore constraints on this wide range of models coming from ghost and Laplacian instabilities. The aim is to limit pathological branches of the theory by fundamental considerations. It is possible to conclude that a very large class of models results physically viable. |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/121230 |
Appears in Collections: | Scholarly Works - InsSSA |
Files in This Item:
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Ghost_and_laplacian_instabilities_in_teleparallel_horndeski_gravity(2023).pdf Restricted Access | 806.27 kB | Adobe PDF | View/Open Request a copy |
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