An Improved Brane Anti-Brane Action from Boundary Superstring Field Theory and Multi-Vortex Solutions

TL;DR

This paper derives an improved effective action for D-brane-anti-D-brane systems from boundary superstring field theory, revealing explicit multi-vortex solutions and exploring their stability and implications for early universe cosmology.

Contribution

It provides a new, explicit form of the brane anti-brane effective action with multi-vortex solutions and analyzes their stability and cosmological relevance.

Findings

Explicit multi-vortex solutions with flux degeneracy

Distant brane-anti-brane pairs can decay via quantum tunneling

The action is suitable for studying inflation and defect production

Abstract

We present an improved effective action for the D-brane-anti-D-brane system obtained from boundary superstring field theory. Although the action looks highly non-trivial, it has simple explicit multi-vortex (i.e. codimension-2 multi-BPS D-brane) multi-anti-vortex solutions. The solutions have a curious degeneracy corresponding to different ``magnetic'' fluxes at the core of each vortex. We also generalize the brane anti-brane effective action that is suitable for the study of the inflationary scenario and the production of defects in the early universe. We show that when a brane and anti-brane are distantly separated, although the system is classically stable it can decay via quantum tunneling through the barrier.