Holography constrains quantum bounce

TL;DR

This paper examines how holographic bounds constrain quantum bounce models in loop cosmology and argues that inflationary phases are unlikely post-bounce due to scalar field dissipation.

Contribution

It demonstrates that non-inflationary quantum bounce scenarios violate holographic bounds and provides an argument against subsequent inflationary phases.

Findings

Holographic bounds are violated during non-inflationary bounces.

Inflationary phases are unlikely after the bounce due to scalar field dissipation.

Quantum bounce models face holographic constraints that challenge their viability.

Abstract

Recent work in quantum loop cosmology suggests the universe undergoes a bounce when evolving from a previous collapsing phase. However, with non-inflationary matter sources, the scenario appears to strongly violate the holography bound S\leq A/4 during the bounce, where A now represents the cross-sectional area of the bounce. We also give a simple argument why any inflationary phase after the bounce is unlikely due to prior dissipation of a scalar field kinetic energy phase into regular matter components.