How Emergent is Gravity?

Abstract

General theory of relativity (or Lovelock extensions) is a dynamical theory; given an initial configuration on a space-like hypersurface, it makes a definite prediction of the final configuration. Recent developments suggest that gravity may be described in terms of macroscopic parameters. It finds a concrete manifestation in the fluid-gravity correspondence. Most of the efforts till date has been to relate equilibrium configurations in gravity with fluid variables. In order for the emergent paradigm to be truly successful, it has to provide a statistical mechanical derivation of how a given initial static configuration evolves into another. In this essay, we show that the energy transport equation governed by the fluctuations of the horizon-fluid is similar to Raychaudhuri equation and, hence gravity is truly emergent.

This Essay Received Honorable mention in the Gravity Research Essay Competition-2015; 8 Pages

References in corpus (2)

• Quantum Shock Waves - the case for non-linear effects in dynamics of electronic liquids
• Where are the black hole entropy degrees of freedom ?

Cited by in corpus (7)

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• Generalized Lagrangian Path approach to manifestly-covariant quantum gravity theory
• Fluctuations in horizon-fluid lead to negative bulk viscosity
• Negative specific heat of black-holes from Fluid-Gravity Correspondence
• Statistical modeling of the fluid dual to Boulware-Deser Black hole
• Black-hole event horizons-Teleology and Predictivity
• Effective field theory description of horizon-fluid determines the scrambling time