We refine and slightly enlarge the recently proposed first-order thermodynamics of scalar-tensor gravity to include gravitational scalar fields with timelike and past-directed gradients. The implications and subtleties arising in this situation are discussed and an exact cosmological solution of scalar-tensor theory in first-order thermodynamics is revisited in light of these results.
Giusti, A., Giardino, S., Faraoni, V. (2023). Past-directed scalar field gradients and scalar-tensor thermodynamics. GENERAL RELATIVITY AND GRAVITATION, 55(3), 1-12 [10.1007/s10714-023-03095-7].
Past-directed scalar field gradients and scalar-tensor thermodynamics
Giusti, Andrea;
2023
Abstract
We refine and slightly enlarge the recently proposed first-order thermodynamics of scalar-tensor gravity to include gravitational scalar fields with timelike and past-directed gradients. The implications and subtleties arising in this situation are discussed and an exact cosmological solution of scalar-tensor theory in first-order thermodynamics is revisited in light of these results.File in questo prodotto:
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