Regarding the polarization correlation studies generated using parametric down conversion. All the studies appear to be done correlating the polarization of linearly polarized photons. Has any experiment been done showing the same effect with circularly polarized light? 1) If this experiment has been done with circular polarized light, then that would mean that quanta of angular momentum are being transferred faster light. 2) But if this experiment can only be done using linear polarized light I wouldn't find it as exciting. Because linear states are a super position of circularly polarized light. The orientation (s or p) depends on the phase between the different helicities. In which case, it's the phase that is propagating faster than light. Super luminal phase velocities aren't anything new or exciting to us.