More on the first-order thermodynamics of scalar-tensor and Horndeski gravity

Two issues in the first-order thermodynamics of scalar-tensor (including “viable” Horndeski) gravity are elucidated. The application of this new formalism to FLRW cosmology is shown to be fully legitimate and then extended to all Bianchi universes. It is shown that the formalism holds thanks to the...

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Autores principales: Faraoni, Valerio, Houle, Julien
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2023
Materias:
Regular Article - Theoretical Physics
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10281912/
https://www.ncbi.nlm.nih.gov/pubmed/37351520
http://dx.doi.org/10.1140/epjc/s10052-023-11712-7
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author Faraoni, Valerio
Houle, Julien
author_facet Faraoni, Valerio
Houle, Julien
author_sort Faraoni, Valerio
collection PubMed
description Two issues in the first-order thermodynamics of scalar-tensor (including “viable” Horndeski) gravity are elucidated. The application of this new formalism to FLRW cosmology is shown to be fully legitimate and then extended to all Bianchi universes. It is shown that the formalism holds thanks to the almost miraculous fact that the constitutive relations of Eckart’s thermodynamics are satisfied, while writing the field equations as effective Einstein equations with an effective dissipative fluid does not contain new physics.
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spelling pubmed-102819122023-06-22 More on the first-order thermodynamics of scalar-tensor and Horndeski gravity Faraoni, Valerio Houle, Julien Eur Phys J C Part Fields Regular Article - Theoretical Physics Two issues in the first-order thermodynamics of scalar-tensor (including “viable” Horndeski) gravity are elucidated. The application of this new formalism to FLRW cosmology is shown to be fully legitimate and then extended to all Bianchi universes. It is shown that the formalism holds thanks to the almost miraculous fact that the constitutive relations of Eckart’s thermodynamics are satisfied, while writing the field equations as effective Einstein equations with an effective dissipative fluid does not contain new physics. Springer Berlin Heidelberg 2023-06-20 2023 /pmc/articles/PMC10281912/ /pubmed/37351520 http://dx.doi.org/10.1140/epjc/s10052-023-11712-7 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . Funded by SCOAP3. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.
spellingShingle Regular Article - Theoretical Physics
Faraoni, Valerio
Houle, Julien
More on the first-order thermodynamics of scalar-tensor and Horndeski gravity
title More on the first-order thermodynamics of scalar-tensor and Horndeski gravity
title_full More on the first-order thermodynamics of scalar-tensor and Horndeski gravity
title_fullStr More on the first-order thermodynamics of scalar-tensor and Horndeski gravity
title_full_unstemmed More on the first-order thermodynamics of scalar-tensor and Horndeski gravity
title_short More on the first-order thermodynamics of scalar-tensor and Horndeski gravity
title_sort more on the first-order thermodynamics of scalar-tensor and horndeski gravity
topic Regular Article - Theoretical Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10281912/
https://www.ncbi.nlm.nih.gov/pubmed/37351520
http://dx.doi.org/10.1140/epjc/s10052-023-11712-7
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