Thermodynamics of homogeneous Universes: de Sitter, Bonnor-Melvin and static Einstein
Abstract
In the theories, in which dynamic gravitational field emerges from the underlying matter fields, the gravitational field can be considered as a part of matter. Using this approach, we construct the thermodynamics of the homogeneous Universes -- the de Sitter Universe, the Bonnor-Melvin-Λ Universe and the static Einstein Universe. It is demonstrated that although these three Universes have different types of matter fields (ordinary matter, magnetic field, gravitational field and vacuum energy), they have the same thermodynamic properties. Their energy densities obey the same equation, which contains the corresponding matter densities and the pairs of the thermodynamically conjugate variables. In Minkowski vacuum, where the ordinary matter and magnetic and gravitational fields are absent, this thermodynamic approach automatically leads to zero cosmological constant.
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BibTeX
@misc{volovik2026thermodynamics,
title = {{Thermodynamics of homogeneous Universes: de Sitter, Bonnor-Melvin and static Einstein}},
author = {G. E. Volovik},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2605.21047},
eprint = {2605.21047},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.21047},
}
RIS
TY - UNPB
TI - Thermodynamics of homogeneous Universes: de Sitter, Bonnor-Melvin and static Einstein
AU - G. E. Volovik
PY - 2026
DA - 2026/08/30
PB - arXiv
DO - 10.48550/arxiv.2605.21047
UR - https://arxiv.org/abs/2605.21047
AB - In the theories, in which dynamic gravitational field emerges from the underlying matter fields, the gravitational field can be considered as a part of matter. Using this approach, we construct the thermodynamics of the homogeneous Universes -- the de Sitter Universe, the Bonnor-Melvin-Λ Universe and the static Einstein Universe. It is demonstrated that although these three Universes have different types of matter fields (ordinary matter, magnetic field, gravitational field and vacuum energy), they have the same thermodynamic properties. Their energy densities obey the same equation, which contains the corresponding matter densities and the pairs of the thermodynamically conjugate variables. In Minkowski vacuum, where the ordinary matter and magnetic and gravitational fields are absent, this thermodynamic approach automatically leads to zero cosmological constant.
ER -