Gravitationally induced interference of gravitational waves by a rotating massive object

We discuss an interesting effect induced by the rotation of a massive object acting as a lens for coherent gravitational radiation. We show that the result is a concentric interference pattern which is shifted due to the effect of the angular momentum on the phase of radiation, an effect analogous to the Aharonov-Bohm effect. The possibility of detecting lensed gravitational waves is discussed in the context of upcoming gravitational wave detectors.