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arXiv · hep-th/0602025

D-branes in Nongeometric Backgrounds

Albion Lawrence·Michael B. Schulz·Brian Wecht
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Abstract

"T-fold" backgrounds are generically-nongeometric compactifications of string theory, described by T^n 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 g_s and alpha') on T^n fibrations over S^1 with O(n,n;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 T^n fibration over a multiple cover of N.

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Albion Lawrence, Michael B. Schulz, Brian Wecht. 2006-04-20. D-branes in Nongeometric Backgrounds. https://doi.org/10.1088/1126-6708%2F2006%2F07%2F038

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