Spacelike and Time Dependent Branes from DBI

TL;DR

This paper explores new time-dependent brane solutions derived from the Dirac-Born-Infeld equations, linking them to cosmological models and tachyon condensation, expanding understanding of unstable brane configurations.

Contribution

It introduces novel time-dependent brane solutions obtained via analytic continuation of DBI equations, connecting them to gravity solutions and cosmological applications.

Findings

New solutions resemble Witten bubble and S-branes

Connections to tachyon condensation processes

Potential relevance to cosmological scenarios

Abstract

Spacelike branes are new time-dependent systems to explore and it has been observed that related supergravity solutions can be obtained by analytically continuing known D-brane solutions. Here we show that analytic continuation of known solutions of the Dirac-Born-Infeld equations also lead to interesting analogs of time dependent gravity solutions. Properties of these new solutions, which are similar to the Witten bubble of nothing and S-branes, are discussed. We comment on how these new bubble solutions seem relevant to the tachyon condensation process of non-BPS branes, and remark on their application to cosmological scenarios. Unstable brane configurations which resemble S-brane type solutions are also discussed.