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

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.

arXiv comment10 pages, no figures

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• First-order thermodynamics of scalar-tensor gravity
• Alternative formulations of the thermodynamics of scalar-tensor theories
• Black hole ringdown from physically sensible initial value problem in higher-order scalar-tensor theories
• Non-Noetherian conformal Cheshire effect
• Thermal channels of scalar and tensor waves in Jordan-frame scalar--tensor gravity
• Thermal description of braneworld effective theories