First-order thermodynamics of scalar-tensor gravity
read the original abstract
The first-order thermodynamics of scalar-tensor theory is a novel approach that exploits the intriguing relationship between gravity and thermodynamics to better understand the space of gravity theories. It is based on using Eckart's first-order irreversible thermodynamics on the effective imperfect fluid describing scalar-tensor gravity and characterises General Relativity as an equilibrium state, and scalar-tensor theories as non-equilibrium states, naturally describing the approach to equilibrium. Applications of this framework to cosmology, extensions to different classes of modified theories, and the formulation of two complementary descriptions based on the notions of temperature and chemical potential all contribute to a new and unifying picture of the landscape of gravity theories.
This paper has not been read by Pith yet.
Forward citations
Cited by 3 Pith papers
-
First-order thermodynamics of multi-scalar-tensor gravity
Multi-scalar-tensor gravity admits an exact covariant thermodynamic interpretation as an imperfect fluid whose heat flux involves a coupling-derived factor χ and a residual gradient sector, yielding multi-field therma...
-
Frame invariant diffusive formulation of scalar-tensor gravity
Scalar-tensor gravity admits a frame-invariant perfect-fluid description with zero temperature, so that general relativity corresponds to diffusive equilibrium for both minimal and nonminimal theories.
-
Towards a causal effective thermodynamics of scalar-tensor gravity
Extends scalar-tensor gravity thermodynamics to causal Israel-Stewart model via timelike heat flux ansatz, decoupling T and K while preserving GR equilibrium.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.