SL(2,Z) tensionless string backgrounds in IIB string theory

TL;DR

This paper investigates a tensionless limit of SL(2,Z) backgrounds in IIB supergravity, revealing a Minkowski space with a delta-like singularity, and analyzes the resulting field content and energy-momentum tensor.

Contribution

It introduces a novel tensionless limit of SL(2,Z) backgrounds in IIB supergravity via infinite boost, providing new insights into tensionless string backgrounds.

Findings

Reproduces Minkowski space with a delta-like singularity

Analyzes the field content in the tensionless limit

Examines the energy-momentum tensor in the new background

Abstract

We examine a tensionless limit of a SL(2,Z) set of background solutions to IIB supergravity theory, obtained by performing an infinite boost. This yields a solution that corresponds to taking the original string tension to zero. The limit reproduces ordinary Minkowski space except for a delta-like singularity along the string. We study the field content and the energy momentum tensor.