Duality rotations and BPS monopoles with space and time noncommutativity Original Research Article

We show that noncommutative electromagnetism and Dirac–Born–Infeld (DBI) theory with scalar fields are SL(2,R) self-dual when noncommutativity is light-like and we are in the slowly varying field approximation. This follows from SL(2,R) self-duality of the commutative DBI Lagrangian and of its zero slope limit that we study in detail.