Some New Light-cone Time Dependent Solutions in Deformed pp-wave Backgrounds

TL;DR

This paper presents new brane solutions and their bound states in light-cone time dependent pp-wave backgrounds, which are cosmologically singular and preserve a fraction of supersymmetry, enhancing understanding of singularities in string theory.

Contribution

It introduces novel brane solutions in light-cone time dependent backgrounds and analyzes their supersymmetry properties, contributing to the study of cosmological singularities in string theory.

Findings

Solutions are cosmologically singular at the classical level.

Backgrounds preserve 1/8 of type IIB supersymmetry.

New bound state configurations are constructed.

Abstract

Brane solutions in time \ light-cone time dependent backgrounds are of interest in order to gain a deeper understanding of the physics associated with cosmological and null singularities. In this paper, we report both brane solutions and their bound states in light-cone time dependent pp wave-like backgrounds. We show that the backgrounds our solutions live in are all cosmologically singular (lightlike) at the classical level. A spacetime supersymmetry analysis of the backgrounds reveals that they retain 1/8 of the full type IIB supersymmetry.