Sonia Stanciu
Abstract :
In order to describe geometrically D-branes, one has to specify the submanifold on which the D-brane wraps together with a bundle on it. By considering the case of symmetric D-branes in group manifolds, we discuss the way in which this picture has to be generalised in the case of a curved background with a topologically non-trivial B-field.
References :
Martin Schnabl
Abstract :
We construct exact solitons on noncommutative tori for the type of actions arising from open string field theory. Given any projector that describes an extremum of the tachyon potential, we interpret the remaining gauge degrees of freedom as a gauge theory on the projective module determined by the tachyon. Whenever this module admits a constant curvature connection, it solves exactly the equations of motion of the effective string field theory. We describe in detail such a construction on the noncommutative tori. Whereas our exact solution relies on the coupling to a gauge theory, we comment on the construction of approximate solutions in the absence of gauge fields.
References :
hep-th/0104090