Graviton-photon oscillation in alternative theories of gravity
  In this paper we investigate graviton-photon oscillation in the presence of
an external magnetic field in alternative theories of gravity. Whereas the
effect of an effective refractive index for the electromagnetic radiation was
already considered in the literature, we develop the first approach to take
into account the effect of the modification of the predictions for
gravitational waves in alternative theories of gravity in the phenomenon of
graviton-photon mixing.
