Frame-like Geometry of Double Field Theory

Abstract

We relate two formulations of the recently constructed double field theory to a frame-like geometrical formalism developed by Siegel. A self-contained presentation of this formalism is given, including a discussion of the constraints and its solutions, and of the resulting Riemann tensor, Ricci tensor and curvature scalar. This curvature scalar can be used to define an action, and it is shown that this action is equivalent to that of double field theory.

35 pages, v2: minor corrections, to appear in J. Phys. A

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• Higher-derivative Heterotic Double Field Theory and Classical Double Copy
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