Strings on Orientifolds

TL;DR

This paper constructs and analyzes various Type IIB orientifold compactifications, exploring their dualities and resulting models with specific supersymmetry, gauge groups, and tensor multiplets in different dimensions.

Contribution

It provides explicit examples of Type IIB orientifold compactifications and their dual descriptions, expanding the understanding of string dualities and model building.

Findings

Models with N=1 supersymmetry in six dimensions

A nine-dimensional model dual to M-theory on a Klein bottle

Diverse gauge groups and tensor multiplets in constructed models

Abstract

We construct several examples of compactification of Type IIB theory on orientifolds and discuss their duals. In six dimensions we obtain models with $N=1$ supersymmetry, multiple tensor multiplets, and different gauge groups. In nine dimensions we obtain a model that is dual to M-theory compactified on a Klein bottle.