A New Interpretation of Two-Photon Entangled Experiments via Quantum   Mirrors
  In this paper the coherence and crossing symmetry of the electromagnetic interaction of photons involved in the spontaneous parametric down conversion (SPDC) phenomena in nonlinear crystals, are investigated. On this basis a new interpretation of the recent results on the two photon entangled experiment is obtained. A new field of applications is suggested. 
D. B. Ion, P. Constantin and M.L. Ion