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D-branes in nongeometric backgrounds

Albion Lawrence1, Michael B. Schulz2 and Brian Wecht3

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``T-fold" backgrounds are generically-nongeometric compactifications of string theory, described by Tn fibrations over a base N with transition functions in the perturbative T-duality group. We review Hull's doubled torus formalism, which geometrizes these backgrounds, and use the formalism to constrain the D-brane spectrum (to leading order in gs and α') on Tn fibrations over S1 with O(n,n;Bbb Z) monodromy. We also discuss the (approximate) moduli space of such branes and argue that it is always geometric. For a D-brane located at a point on the base N, the classical ``D-geometry'' is a Tn fibration over a multiple cover of N.

Keywords

Superstring Vacua

D-branes

 

E-print Number: hep-th/0602025

Cited: by |

Refers: to

PACS

11.25.Uv D branes

11.25.Mj Compactification and four-dimensional models

Subjects

Particle physics and field theory

Dates

Issue 07 (July 2006)

Received 22 April 2006, accepted for publication 26 June 2006

Published 24 July 2006



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