Viscous Spacetime Fluid and Higher Curvature GravityReportar como inadecuado



 Viscous Spacetime Fluid and Higher Curvature Gravity


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The Einstein field equation as an equation of state of a thermodynamical system of spacetime is reconsidered in the present Letter. We argue that a consistent interpretation leads us to identify scalar curvature and cosmological constant terms representing the bulk viscosity of the spacetime fluid. Since Einstein equation itself corresponds to a near-equilibrium state in this interpretation invoking $fR$ gravity for nonequilibrium thermodynamics is not required. A logically consistent generalization to include the effect of so called tidal forces due to the Riemann curvature is presented. A new equation of state for higher curvature gravity is derived and its physical interpretation is discussed.



Autor: S. C. Tiwari

Fuente: https://archive.org/



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