Quantum communication exploiting above threshold OPO intensity correlations and polarization encoding

摘要: We present a continuous variable quantum communication protocol based on bright continuous-wave twin-beams generated by type-II OPO. Intensity correlation between the beams is used in conjunction with binary randomization of polarization to guarantee security and reveal eavesdropping actions. The scheme presented asymmetric. Bob (the receiver) retains one sends other Alice after random rotation its polarization. cryptographic key elements are encoded through amplitude modulation Alice, who back her beam second Eventually, detected further rotation. system possibility revealing action case an individual attack demonstrated evaluating bit error rates.