2021/05/01 by Pedro Bargueño, Pedro Bargueno, Ernesto Contreras +2
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Entropy (arrow of time) #Equilibrium thermodynamics #Extended irreversible thermodynamics #First law of thermodynamics #Friedmann equations #Non-equilibrium thermodynamics #Physics #Quantum Electrodynamics and Casimir Effect #Quantum mechanics #Statistical physics #Thermodynamics #gr-qc
paper · pdf · doi:10.1140/epjc/s10052-021-09274-7
To be published in EPJC
openalex publication_date 2021/05/01 · arxiv created 2021/05/21 · arxiv updated 2021/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract In this work, the role of a time-varying Newton constant under the scale-dependent approach is investigated in the thermodynamics of the Friedman equations. In particular, we show that the extended Friedman equations can be derived either from equilibrium thermodynamics when the non-matter energy momentum tensor is interpreted as a fluid or from non-equilibrium thermodynamics when an entropy production term, which depends on the time-varying Newton constant, is included. Finally, a comparison between black hole and cosmological thermodynamics in the framework of scale-dependent gravity is briefly discussed.