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Return of the Torsion D-Branes | | Ilka Brunner
; Jacques Distler
; Rahul Mahajan
; | | Date: |
28 Jun 2001 | | Journal: | Adv.Theor.Math.Phys. 5 (2002) 311-352 | | Subject: | hep-th | | Abstract: | We study D-branes on Calabi-Yau manifolds, carrying charges which are torsion elements of the K-theory. Interesting physics ensues when we follow these branes into nongeometrical phases of the compactification. On the level of K-theory, we determine the monodromies of the group of charges as we circle singular loci in the closed string moduli space. Going beyond K-theory, we discuss the stability of torsion D-branes as a function of the Kähler moduli. When the fundamental group of the Calabi-Yau is nonabelian, we find evidence for new threshold bound states of BPS branes. In a two-parameter example, we compare our results with computations in the Gepner model. Our study of the torsion D-branes in the compactification of [FHSV] sheds light on the physics of that model. In particular, we develop a proposal for the group of allowed D-brane charges in the presence of discrete RR fluxes. | | Source: | arXiv, hep-th/0106262 | | Services: | Forum | Review | PDF | Favorites | |
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