Second law of thermodynamics in nonminimally coupled gravity

• Tipo: Artigo em Revista Científica Internacional
• Data: 2020

Autores

Azevedo, RPL (Autor) Outra; Avelino, PP (Autor) FCUP

Revista

Título: Europhysics Letters

Vol. 132

ISSN: 0295-5075

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: P-00T-AKT

DOI: 10.1209/0295-5075/132/30005

Abstract (EN): In the present work we show that the second law of thermodynamics does not generally hold if the matter and gravitational fields are nonminimally coupled. We demonstrate this result by explicitly computing the evolution of the entropy of the matter fields in the case of a closed homogeneous and isotropic universe filled with dust and radiation, showing that, in this case, the sign of the entropy variation is determined by the evolution of the universe. The preservation of the second law of thermodynamics in these modified theories would require its generalization to account for a gravitational entropy contribution.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7