The quantum mechanical vacuum (i.e. the vacuum of a typical QFT) viewed as the zero-point state of the system has an energy (of course, here enters the Vacuum Catastrophe and all the mess that follows).
The question: if we have a ray of light (a null geodesic) traveling through this vacuum will the ray of light scatter? In a perfect classical vacuum there is no scattering of a light ray, but in this quantum vacuum there is a ground state field that has energy, and therefore it is conceivable that the photon-field would scatter off (interact with) the ground state energy field. Is this incorrect? IF this is not a well-posed question, please help me understand how to make it so.
Note: I realize that the light ray could interact with itself with nonzero probability and thus could scatter off itself - is this distinguishable from the light scattering off of the "energy in the vacuum"?