Background independent action for double field theory

Details Background independent action for double field theory Background independent action for double field theory

2010-03-26

arxiv.org/abs/1003.5027v2

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

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.

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