The initial conditions of the Universe and holography

TL;DR

This paper explores the initial conditions of the universe within holographic cosmology, demonstrating that certain models can be singularity-free and satisfy holographic bounds, especially in accelerated and bouncing scenarios.

Contribution

It extends holographic principles to closed, accelerated, and bouncing cosmological models, providing new insights into initial conditions and singularity avoidance.

Findings

Holographic bounds are saturated in co-dimension one brane universes.

Accelerated models can implement holographic prescriptions successfully.

Singularity-free bouncing cosmological models are possible.

Abstract

We address the initial conditions for an expanding cosmology using the holographic principle. For the case of a closed model, the old prescription of Fishler and Susskind, that uses the particle horizon to encode the bulk degrees of freedom, can be implemented for accelerated models with enough acceleration. As a bonus we have singularity free bouncing models. The bound is saturated for co-dimension one branes dominated universes.