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Lessons from Classical Gravity about the Quantum Structure of Spacetime

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arxiv 1012.4476 v2 pith:FEPAOA7H submitted 2010-12-20 gr-qc astro-ph.COhep-th

T. Padmanabhan This is my paper · ORCID
classification gr-qcastro-ph.COhep-th
keywords gravitationalclassicaldynamicselasticityequationsevidencegravityparadigm
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I present the theoretical evidence which suggests that gravity is an emergent phenomenon like gas dynamics or elasticity with the gravitational field equations having the same status as, say, the equations of fluid dynamics/elasticity. This paradigm views a wide class of gravitational theories - including Einstein's theory - as describing the thermodynamic limit of the statistical mechanics of "atoms of spacetime". The evidence for this paradigm is hidden in several classical features of the gravitational theories and depends on just one quantum mechanical input, viz. the existence of Davies-Unruh temperature of horizons. I discuss several conceptual ingredients of this approach.

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Cited by 2 Pith papers

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  1. Four inequivalent paths to Thermality in Minkowski spacetime

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    Null-shifted Rindler wedges yield selective non-Gibbsian thermality in one chiral sector via Bogoliubov transformations, with the global Minkowski state remaining pure.

  2. Black Hole Thermodynamics via Tsallis Statistical Mechanics

    gr-qc 2025-02 conditional novelty 6.0 of 10

    The authors derive a q-modified black hole entropy from Tsallis statistics applied to a near-horizon gas and show that a negative non-extensive parameter can stabilize a Schwarzschild black hole.

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