Removal of closed time-like curves by supertube domain walls

TL;DR

This paper explores how supertube domain walls can remove closed time-like curves in supergravity backgrounds, highlighting a spreading mechanism akin to the enhançon process, with implications for causality in string theory.

Contribution

It introduces a novel mechanism using supertube domain walls to eliminate closed time-like curves in supergravity, expanding understanding of causality preservation in string theory backgrounds.

Findings

Closed time-like curves can be removed by supertube domain walls.

The spreading mechanism of supertubes is similar to the enhançon mechanism.

Implications for causality in supergravity and string theory backgrounds.

Abstract

We discuss how closed time-like curves can be eliminated from certain supergravity backgrounds by inclusion of domain-walls made of supertubes. Special emphasis is given to the mechanism by which the supertubes spread into domain walls, which is similar to the enhanceon mechanism. Lecture notes from my talk at the RTN meeting in Kolymbari, Crete, September 2004.