Background independent action for double field theory

Abstract

Double field theory describes a massless subsector of closed string theory with both momentum and winding excitations. The gauge algebra is governed by the Courant bracket in certain subsectors of this double field theory. We construct the associated nonlinear background-independent action that is T-duality invariant and realizes the Courant gauge algebra. The action is the sum of a standard action for gravity, antisymmetric tensor, and dilaton fields written with ordinary derivatives, a similar action for dual fields with dual derivatives, and a mixed term that is needed for gauge invariance.

45 pages, v2: minor corrections, refs. added, to appear in JHEP

References in corpus (9)

• Double Field Theory
• Generalised Geometry for M-Theory
• Doubled Geometry and T-Folds
• The gauge algebra of double field theory and Courant brackets
• M-theory, exceptional generalised geometry and superpotentials
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• Generalized E(7(7)) coset dynamics and D=11 supergravity
• Gauge Symmetry, T-Duality and Doubled Geometry
• Field Redefinitions, T-duality and Solutions in Closed String Field Theories

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