Induced gravity in image orientifold models Original Research Article

We consider non-compact image orientifold models of type IIB superstring theory with four-dimensional gravity induced on a set of coincident D3-branes. For the models with odd N the contribution to the one-loop renormalization of the Planck mass is shown to come only from the torus and to be image as the contributions from annulus, Moebius strip and Klein bottle cancel. One can therefore realize the Dvali–Gabadadze–Porrati idea that four-dimensional gravity is induced by quantum effects at the one-loop level by considering large N.