Lectures on Nongeometric Flux Compactifications
Brian Wecht
TL;DR
This paper provides a pedagogical review of nongeometric flux compactifications in string theory, emphasizing the importance of nongeometric fluxes for T-duality invariance and discussing worldsheet descriptions.
Contribution
It introduces the concept of nongeometric fluxes, extending geometric flux compactifications, and discusses their role in T-duality and string theory backgrounds.
Findings
Nongeometric fluxes are essential for T-duality invariance.
Worldsheet descriptions of nongeometric backgrounds are discussed.
Comparison between geometric and nongeometric flux compactifications.
Abstract
These notes present a pedagogical review of nongeometric flux compactifications. We begin by reviewing well-known geometric flux compactifications in Type II string theory, and argue that one must include nongeometric "fluxes" in order to have a superpotential which is invariant under T-duality. Additionally, we discuss some elementary aspects of the worldsheet description of nongeometric backgrounds. This review is based on lectures given at the 2007 RTN Winter School at CERN.
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