zero point field is the same as zero point energy. i know it is sometimes referred to as a field when in a quantum field theory the fabric of space becomes the field and there is an infinite zero point energy (technically).<br /><br />and now, I was so trying to avoid this, we get into the nasty stuff of QM, and i was associating the effects of the photon in regards to the perturbation theory that is sometimes linked to black holes and the event horizon to help characterize dual particles, escape velocities, tired light, ghost particles, etc. The photon is part of that. <br /><br />you're referring to polarition or quasi particles. the photon can be created and destroyed. in these quasi states involving matter or coupling to move through matter, photons transform into the excitations, or get absorbed. but the quasi state must transform back to a photon in order for it to have its properties in tact. otherwise it has mass and cannot travel at c, which it always does, immediately upon re-entering its photonic state.<br /><br />but a photon on its own, doesn't change, ever. zero mass, infinite momentum (at c, there is no change, no internal clock. hold that photon in place, it will stay there forever. which is exactly what happens in a black hole at the event horizon) <div class="Discussion_UserSignature"> </div>