Self-Dual = 8 Supergravity as a Closed String Field Theory in Twistor Space
arXiv:0903.2872
Abstract
A Closed string field theory action is formulated for =8 self-dual supergravity which is off-shell and Lorentz covariant. The bosonic truncation in the quantum field theory limit gives the Plebanski type of action in the super space.
18 pages, latex file