Asymmetric Orbifolds, Noncommutative Geometry and Type I String Vacua
Abstract
We investigate the D-brane contents of asymmetric orbifolds. Using T-duality we find that the consistent description of open strings in asymmetric orbifolds requires to turn on background gauge fields on the D-branes. We derive the corresponding noncommutative geometry arising on such D-branes with mixed Neumann-Dirichlet boundary conditions directly by applying an asymmetric rotation to open strings with pure Dirichlet or Neumann boundary conditions. As a concrete application of our results we construct asymmetric type I vacua requiring open strings with mixed boundary conditions for tadpole cancellation.
Keywords
Cite
@article{arxiv.hep-th/0003024,
title = {Asymmetric Orbifolds, Noncommutative Geometry and Type I String Vacua},
author = {Ralph Blumenhagen and Lars Goerlich and Boris Kors and Dieter Lust},
journal= {arXiv preprint arXiv:hep-th/0003024},
year = {2009}
}
Comments
TeX, harvmac, 24 pages, 2 figures, v2: Clarifying remarks concerning the identification of commutative and non-commutative theories on asymmetric orbifolds; additional references