Brane/flux annihilation in double-throat system

TL;DR

This paper investigates brane/flux annihilation in a double-throat system with homologically equivalent cycles, focusing on how placing anti-D3-branes affects the geometry and fluxes, and comparing it to the thraxion scenario.

Contribution

It introduces a detailed analysis of brane/flux annihilation in a double-throat system with non-identical throats, connecting it to the reduction of geometric differences and the thraxion scenario.

Findings

Describes flux changes during brane/flux annihilation.

Shows how the process reduces throat geometry differences.

Compares with the thraxion scenario.

Abstract

We study the brane/flux annihilation in the double-throat system in which the corresponding cycles of two throats are homologically equivalent. When we put $\overline{\rm D3}$-branes at only one of throat tips, two throats are no longer identical. Then the brane/flux annihilation can be interpreted as the process for reducing the difference between two throat geometries through the transition to the supersymmetric vacuum. To see this, we describe the changes in the amounts of the NSNS 3-form flux supporting the B-cycle contained in two throat regions during the brane/flux annihilation. We also compare our analysis with the recently proposed thraxion scenario, which also describes the inequivalence of two throats caused by the different NSNS 3-form flux distributions in two throat regions.