D1-brane with Overcritical Electric Field in AdS3 and S-brane

TL;DR

This paper explores the properties of S-branes, especially D1-branes with overcritical electric fields in AdS3, using T-duality and tachyon condensation to understand their dynamics and lower-dimensional brane formations.

Contribution

It introduces a novel analysis of Dirichlet S-branes in AdS3 backgrounds and connects tachyon condensation to the formation of lower-dimensional S-branes.

Findings

T-duality applied to unphysical dS2-branes yields S0-branes.

Time-dependent tachyon condensation leads to lower-dimensional S-branes.

Singular solutions correspond to S(p-1)-branes coupling to RR fields.

Abstract

We study aspects of Dirichlet S-branes, which are defined as Dirichlet boundary condition on a time like embedding of open strings, in general backgrounds. By applying T-duality along an isometry of the unphysical dS2-branes in NS-NS supported AdS3-background, we find S0-brane. We also study the time dependent tachyon condensation on the unstable Dp-brane and interpret the singular solutions as lower dimensional S(p-1)-brane that couples to real Ramond-Ramond fields while to imaginary NS-NS modes.