Cosmological Creation of D-branes and anti-D-branes

TL;DR

This paper proposes a cosmological model where the early universe's space-filling branes undergo phase transitions, leading to the natural formation of D-branes, especially D3-branes, via tachyon dynamics and the Kibble mechanism.

Contribution

It introduces a novel scenario for the cosmological creation of D-branes from an initial brane-antibrane system, emphasizing entropic preferences and phase transition dynamics.

Findings

D-branes are produced during phase transitions at low temperatures.

Lower-dimensional D-branes, especially D3-branes, are exponentially favored.

At least one D-brane per Hubble volume is generated in the process.

Abstract

We argue that the early universe may be described by an initial state of space-filling branes and anti-branes. At high temperature this system is stable. At low temperature tachyons appear and lead to a phase transition, dynamics, and the creation of D-branes. These branes are cosmologically produced in a generic fashion by the Kibble mechanism. From an entropic point of view, the formation of lower dimensional branes is preferred and $D3$ brane-worlds are exponentially more likely to form than higher dimensional branes. Virtually any brane configuration can be created from such phase transitions by adjusting the tachyon profile. A lower bound on the number defects produced is: one D-brane per Hubble volume.