Double supergeometry

Understand

A geometry of superspace corresponding to double field theory is developed, with type II supergravity in D=10 as the main example.

• The formalism is based on an orthosymplectic extension OSp(d,d|2s) of the continuous T-duality group.
• Covariance under generalised super-diffeomorphisms is manifest.
• Ordinary superspace is obtained as a solution of the orthosymplectic section condition.