Holographic Entropy Production

TL;DR

This paper demonstrates that holographic principles can be observed in Einstein's gravity and generalized theories without requiring asymptotic AdS conditions, linking boundary entropy production to bulk black hole entropy increase.

Contribution

It proposes a holographic principle applicable beyond AdS spacetimes and provides a general proof connecting boundary entropy production with bulk black hole entropy growth.

Findings

Established a holographic correspondence in non-AdS spacetimes.

Proved the equality between boundary entropy production and bulk black hole entropy increase.

Analyzed entropy production in holographic superconductors and superfluids.

Abstract

The suspicion that gravity is holographic has been supported mainly by a variety of specific examples from string theory. In this paper, we propose that such a holography can actually be observed in the context of Einstein's gravity and at least a class of generalized gravitational theories, based on a definite holographic principle where neither is the bulk space-time required to be asymptotically AdS nor the boundary to be located at conformal infinity, echoing Wilson's formulation of quantum field theory. After showing the general equilibrium thermodynamics from the corresponding holographic dictionary, in particular, we provide a rather general proof of the equality between the entropy production on the boundary and the increase of black hole entropy in the bulk, which can be regarded as strong support to this holographic principle. The entropy production in the familiar holographic superconductors/superfluids is investigated as an important example, where the role played by the holographic renormalization is explained.