Orientifolds of type IIA strings on Calabi-Yau manifolds

TL;DR

This paper explores dualities between type IIA orientifolds on Calabi-Yau manifolds and M-theory on G_2-holonomy spaces, and discusses constructing crosscap states in Gepner models, advancing understanding of string dualities and conformal field theory techniques.

Contribution

It identifies specific type IIA orientifolds dual to M-theory on G_2 manifolds and develops methods for constructing crosscap states in Gepner models, linking different string theory frameworks.

Findings

Established duality between type IIA orientifolds and M-theory G_2 compactifications.

Developed a construction method for crosscap states in Gepner models.

Enhanced understanding of orientifold and duality structures in string theory.

Abstract

We identify type IIA orientifolds that are dual to M-theory compactifications on manifolds with G_2-holonomy. We then discuss the construction of crosscap states in Gepner models. (Based on a talk presented by S.G. at PASCOS 2003 held at the Tata Institute of Fundamental Research, Mumbai during Jan. 3-8, 2003.)