Quantum state tomography using photon number counting to evaluate entanglement generated by spontaneous parametric downconversion
Akio Yoshizawa, Daiji Fukuda, Hidemi Tsuchida · 2012
We analyze polarization-entangled photon pairs using detectors that can or cannot count photons to discuss accuracy of the fidelity estimated by quantum state tomography. The use of four photon-number-resolving detectors presents best accuracy.