Ramond-Ramond Fields, Cohomology and Non-Geometric Fluxes

Details Ramond-Ramond Fields, Cohomology and Non-Geometric Fluxes Ramond-Ramond Fields, Cohomology and Non-Geometric Fluxes

2007-10-26

arxiv.org/abs/0710.5158v2

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, uses utarticle.cls, v2: minor changes and references added

Scientific paper

We consider compactifications of type II string theory in which a d-dimensional torus is fibered over a base X. In string theory, the transition functions of this fibration need not be simply diffeomorphisms of T^d but can involve elements of the T-duality group Spin(d,d,Z). We precisely define the notion of a T-fold with NSNS flux. Given such a T-fold, we define the Z_2-graded cohomology theory describing the unquantized RR field strengths and discuss how the data of a T-fold can be interpreted in terms of generalized NSNS fluxes and the twisted differential of Shelton-Taylor-Wecht.

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