English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Other

Orientifolds and Ktheory

MPS-Authors

Stefanski,  Bogdan
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

3080.pdf
(Preprint), 297KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Braun, V., & Stefanski, B. (2002). Orientifolds and Ktheory.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-5485-4
Abstract
Recently it has been shown that D-branes in orientifolds are not always described by equivariant Real Ktheory. In this paper we define a previously unstudied twisted version of equivariant Real K-theory which gives the D-brane spectrum for such orientifolds. We find that equivariant Real K-theory can be twisted by elements of a generalised group cohomology. This cohomology classifies all orientifolds just as group cohomology classifies all orbifolds. As an example we consider the $Omega imesI_4$ orientifolds. We completely determine the equivariant orthogonal K-theory $KO_{Zop_2}(R^{p,q})$ and analyze the twisted versions. Agreement is found between K-theory and BCFT results for both integrally and torsion charged D-branes