Calculation of Nonperturbative Terms in Open String Models

TL;DR

This paper computes nonperturbative corrections in open string models with boundary conditions, exploring complex phase structures and conditions for integrality of invariants in specific noncompact geometries.

Contribution

It introduces a method to calculate nonperturbative terms in open string models and analyzes their phase structures and integrality conditions.

Findings

Calculated nonperturbative corrections for specific geometries.

Explored complex phase structure in one of the models.

Discussed conditions for the integrality of numerical invariants.

Abstract

Nonperturbative corrections in type II string theory corresponding to Riemann surfaces with one boundary are calculated in several noncompact geometries of desingularized orbifolds. One of these models has a complicated phase structure which is explored. A general condition for integrality of the numerical invariants is discussed.