Past-directed scalar field gradients and scalar-tensor thermodynamics
Andrea Giusti, Serena Giardino, Valerio Faraoni
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.
Topics & Concepts
PhysicsScalar fieldScalar theories of gravitationScalar (mathematics)Scalar–tensor theoryMathematical physicsGravitationTensor (intrinsic definition)Tensor fieldClassical mechanicsExact solutions in general relativityClassical field theoryTheoretical physicsQuantum mechanicsGeometryMathematicsCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsPulsars and Gravitational Waves Research