Gauge Transformation of Double Field Theory for Open String

Abstract

We combine symmetry structures of ordinary (parallel directions) and dual (transversal directions) coordinates to construct the Dirac-Born-Infeld (DBI) theory. The ordinary coordinates are associated with the Neumann boundary conditions and the dual coordinates are associated with the Dirichlet boundary conditions. Gauge fields become scalar fields by exchanging the ordinary and dual coordinates. A gauge transformation of a generalized metric is governed by the generalized Lie derivative. The gauge transformation of the massless closed string theory gives the $C$-bracket, but the gauge transformation of the open string theory gives the $F$-bracket. The $F$-bracket with the strong constraints is different from the Courant bracket by an exact one-form. This exact one-form should come from the one-form gauge field. Based on symmetry point of view, we deduce a suitable action with a non-zero $H$-flux at the low-energy level. From an equation of motion of the scalar dilaton, it defines a generalized scalar curvature. Finally, we construct a double sigma model with a boundary term and show that this model with constraints is classically equivalent to the ordinary sigma model.

30 pages, minor changes

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Cited by in corpus (7)

• Double supergeometry
• Semi-doubled Sigma Models for Five-branes
• One-Loop $\beta$ Function of the Double Sigma Model with Constant Background
• Boundary Conditions and the Generalized Metric Formulation of the Double Sigma Model
• Electric-Magnetic Dualities in Non-Abelian and Non-Commutative Gauge Theories
• Solution-generating transformations in duality-invariant theories and the fluid/gravity correspondence
• Cosmological constant as quantum error correction from generalised gauge invariance in double field theory