Confining Strings from $G_2$-holonomy spacetimes

TL;DR

This paper explores the emergence of confining strings in specific M theory backgrounds with $G_2$-holonomy, linking geometric singularities to gauge theory confinement phenomena.

Contribution

It identifies confining strings with expected charges in gravity duals of $G_2$-holonomy spacetimes for various gauge groups, advancing the understanding of gauge/gravity correspondence.

Findings

Confining strings are identified in gravity duals.

Strings carry charges matching gauge theory expectations.

Results apply to multiple gauge groups including SO(2n), E6, E7, E8.

Abstract

The low energy physics of M theory near certain singularities of $G_2$-holonomy spacetimes can be described by pure N=1 super Yang-Mills theory in four dimensions. In this note we consider the cases when the gauge group is SO(2n), E6, E7 or E8. Confining strings with precisely the expected charges are naturally identified in proposed ``gravity duals'' of these singular M theory spacetimes.