Within the context of the de Broglie-Bohm pilot-wave theory, can anyone explain what the pilot wave is in physical terms? I’m having a hard time understanding how, for example, the pilot wave influences the trajectory of a photon in the double-slit experiment. Are we dealing with electromagnetic potentials in a background field, which exert a force on the photon as it moves? Shouldn’t there be a reasonably straight-forward way to alter the path of the photons by inducing another source of pilot waves, such as another photon source acting perpendicular to the path of the photons? It seems like there should be some way to determine if the pilot wave is real by performing some kind of experiment like this to directly alter the shape of the pilot wave, and settle the question once and for all. But I can’t seem to find a phenomenological explanation of the pilot wave which would provide a practical means of interacting with it. Does anyone have any insight on this? Thank you for your thoughts.