Fractional Brane State in the Early Universe

TL;DR

This paper explores how fractional branes, which explain black hole entropy, might influence the early Universe's matter dynamics, potentially leading to new insights into cosmology and quantum gravity effects.

Contribution

It introduces a model applying fractional branes to early Universe matter, deriving an analytical equation of state and suggesting possible non-local quantum gravity effects.

Findings

Derived an analytical equation of state for early Universe matter with fractional branes.

Proposed that fractional branes could induce non-local quantum gravity effects.

Suggested implications for cosmology and the understanding of the early Universe.

Abstract

In the early Universe matter was crushed to high densities, in a manner similar to that encountered in gravitational collapse to black holes. String theory suggests that the large entropy of black holes can be understood in terms of fractional branes and antibranes. We assume a similar physics for the matter in the early Universe, taking a toroidal compactification and letting branes wrap around the cycles of the torus. We find an equation of state p_i=w_i rho, for which the dynamics can be solved analytically. For black holes, fractionation can lead to non-local quantum gravity effects across length scales of order the horizon radius; similar effects in the early Universe might change our understanding of Cosmology in basic ways.