Supergravity S-Branes

TL;DR

This paper constructs supergravity solutions for space-like branes in string theory using solution-generating techniques, exploring their properties, bound states, and singularity structures.

Contribution

It introduces a method to generate SDp-brane solutions and their bound states from time-dependent Einstein equations, expanding understanding of space-like branes.

Findings

All SDp-brane solutions are obtained.

Bound states of SDp/SD(p-2) and SDp/SD(p-4) are constructed.

Initial analysis of near-brane regions and singularities.

Abstract

We construct supergravity solutions corresponding to space-like branes in string theory. Our approach is to apply the usual solution generating techniques to an appropriate time-dependent solution of the eleven dimensional vacuum Einstein equations. In this way all SDp-brane solutions are obtained, as well as the NS and M-theory space branes. Bound states of SDp/SD(p-2)- and SDp/SD(p-4)-branes are also constructed. Finally, we begin an investigation of the near-brane regions and singularity structure of these solutions.