Non-Perturbative interactions in two-dimensional (super) string theory

TL;DR

This paper investigates non-perturbative effects in two-dimensional string theories, focusing on bosonic and superstring models, and explores their potential connections to higher-dimensional theories.

Contribution

It advances understanding of non-perturbative interactions in two-dimensional superstring theory and their relation to higher-dimensional string frameworks.

Findings

Identification of stringy instantons in bosonic string theory

Progress in understanding non-perturbative effects in superstring theory

Discussion of links to higher-dimensional string models

Abstract

Non-perturbative interactions in the effective action of two-dimensional bosonic string theory are described. These interactions are due to ``stringy" instantons that are associated with a space-varying coupling parameter. We present progress towards identifying similar non-perturbative interactions in the effective action of two-dimensional superstring theory. We discuss the possible relation to higher dimensional string theory.