What is it about?

This is like the scenario adopted by Boltzmann. In static spacetime, which is like an equilibrium scenario, the holographic equipartition holds. This leads to the equipartition law for energy in a given spacetime volume just like a thermodynamic system. While for non-static situation the difference between surface and bulk degrees of freedom is responsible for spacetime evolution.

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Why is it important?

It is extremely important, for this shows that the spacetime can be thought of as an thermodynamic system. Thus the dynamics of spacetime (governed by gravity) is actually thermodynamics. Hence gravity should be an emergent phenomenon.

Perspectives

This a nice piece of work. everything fits together. Moreover it holds in all higher order theories with second order field equations. This is quiet important given the physical interpretations.

Dr Sumanta Chakraborty
Indian Association for the Cultivation of Science

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This page is a summary of: Evolution of spacetime arises due to the departure from holographic equipartition in all Lanczos-Lovelock theories of gravity, Physical Review D, December 2014, American Physical Society (APS),
DOI: 10.1103/physrevd.90.124017.
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