The laws of thermodynamics and information for emergent cosmology

TL;DR

This paper develops a thermodynamic and information-theoretic framework for cosmology, deriving fundamental equations like Friedmann's from entropy and information loss principles, and introduces a new horizon entropy concept.

Contribution

It extends Padmanabhan's emergent space approach by incorporating information theory and proposes a new horizon entropy generalizing Bekenstein-Hawking entropy.

Findings

Derivation of Friedmann equations from information loss rates

Introduction of a novel horizon entropy concept

Unified thermodynamic and informational description of the universe

Abstract

The aim here is to provide a set of equations for cosmology in terms of information and thermodynamical parameters. The method we implement in order to describe the universe is a development of Padmanabhan\rq{}s approach which is based on the fact that emergence of the cosmic space is provided by the evolution of the cosmic time. In this line we obtain the Friedmann equation or its equivalent the conservation law in terms of information by the implementation of Laundauer\rq{}s principle or in other words the information loss/production rate. Hence, a self consistent description of the universe is provided in terms of thermodynamical parameters. This is due to the fact that in this work the role of information which is the most important actor of all times, has stepped in to cosmology. We provide a picture of the emergent cosmology merely based on the information theory. In addition, we introduce a novel entropy on the horizon, which can also generalize Bekenstein-Hawking entropy for the asymptotic holographic principle.