Brane Bounce from logarithmic entropic corrections in the bulk

TL;DR

This paper explores how logarithmic entropic corrections in a 5D bulk influence brane-world dynamics, potentially causing a cosmological bounce early on and affecting late-time expansion, with implications for Ekpyrotic cosmology.

Contribution

It generalizes previous entropic correction models to include higher-order terms, revealing their impact on early universe bouncing and late-time cosmological behavior.

Findings

Entropic corrections can trigger a cosmological bounce in the early universe.

These corrections diminish over time, becoming negligible in the late universe.

The model suggests a mechanism for washing out anisotropies, supporting Ekpyrotic scenarios.

Abstract

We calculate new corrections to the Brane-world dynamics, lying in a 5D Schwarzschild-De Sitter black hole, generalizing the result of Nojiri, Odintsov and Ogushi (NOO) in Ref.\cite{Nojiri:2002vu}, The NOO entropy effect is based on the Logharitmic correction to the bulk entropy firstly calculated by Mukherji and Pal in Ref.\cite{Mukherji:2002de}. We calculate higher order contributions to the brane worldsheet. The extra terms obtained lead to interesting implications in brane-cosmology. In particular, new entropic terms rapidly disappear in the late Universe while exploding in the very Early Universe. In particular, we show that they may trigger a cosmological bounce in the very early Universe. On the other hand, they contribute to the cosmological expansion in the Late Universe. We also discuss a scenario in which the BLK anisotropies are washed-out, toward a new Ekpyrotic Brane Cosmology.