Verification of parametric sources of entanglement
Maria Bondani, Matteo G. A. Paris · Journal of Optics B Quantum and Semiclassical Optics · 2002
We suggest a novel scheme for the verification of parametric entanglement sources. The scheme is based on the simple ON/OFF measurement of one of the two parties sharing the entangled state, and on the subsequent verification of the nonclassical character of the conditional state of the other party. The setup is suitable for verifying parametric sources using both photodetection and homodyne detection, depending on the amplifier gain. An experimental setup to implement the verification in the low-gain regime by photodetection is analysed in some detail.