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Transverse generalized metrics and 2d sigma models. (English) Zbl 1428.81125

Summary: We reformulate the compatibility condition between a generalized metric and a small (non-maximal rank) Dirac structure in an exact Courant algebroid found in the context of the gauging of strings and formulated by means of two connections in purely Dirac-geometric terms. The resulting notion, a transverse generalized metric, is also what is needed for the dynamics on the reduced phase space of a string theory.

MSC:

81T30 String and superstring theories; other extended objects (e.g., branes) in quantum field theory
81S30 Phase-space methods including Wigner distributions, etc. applied to problems in quantum mechanics
53D17 Poisson manifolds; Poisson groupoids and algebroids

References:

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