Thermal stability of stealth and de Sitter spacetimes in scalar-tensor gravity

Serena Giardino; Andrea Giusti; Valerio Faraoni

doi:10.1140/epjc/s10052-023-11697-3

Thermal stability of stealth and de Sitter spacetimes in scalar-tensor gravity

Eur Phys J C Part Fields. 2023;83(7):621. doi: 10.1140/epjc/s10052-023-11697-3. Epub 2023 Jul 15.

Authors

Serena Giardino^{1

2}, Andrea Giusti³, Valerio Faraoni⁴

Affiliations

¹ Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Callinstraße 38, 30167 Hannover, Germany.
² Institute for Theoretical Physics, Heidelberg University, Philosophenweg 16, 69120 Heidelberg, Germany.
³ Institute for Theoretical Physics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093 Zurich, Switzerland.
⁴ Department of Physics and Astronomy, Bishop's University, 2600 College Street, Sherbrooke, QC J1M 1Z7 Canada.

Abstract

Stealth solutions of scalar-tensor gravity and less-known de Sitter spaces that generalize them are analyzed regarding their possible role as thermal equilibria at non-zero temperature in the new first-order thermodynamics of scalar-tensor gravity. No stable equilibria are found, further validating the special role of general relativity as an equilibrium state in the landscape of gravity theories, seen through the lens of first-order thermodynamics.