We review the construction of six-dimensional non-geometric string compactifications obtained from torus fibrations with T-duality monodromy. We take a geometric point of view where T-duality twists are identified with Dehn twists of an auxiliary surface fibered over a two dimensional base. Degenerations of this auxiliary surface define codimension-two T-duality defects. For a large class of heterotic defects, we extract the low energy physics by constructing F-theory duals that admit simple Calabi-Yau resolutions.
Stringy geometry from F-theory
Massai S.
2016
Abstract
We review the construction of six-dimensional non-geometric string compactifications obtained from torus fibrations with T-duality monodromy. We take a geometric point of view where T-duality twists are identified with Dehn twists of an auxiliary surface fibered over a two dimensional base. Degenerations of this auxiliary surface define codimension-two T-duality defects. For a large class of heterotic defects, we extract the low energy physics by constructing F-theory duals that admit simple Calabi-Yau resolutions.
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