Presentation Information
[10a-PB3-1]Uncertainty evaluation in quantum-state tomography of visible–mid-infrared polarization-entangled photon pairs
〇(D)Haruya Hirota1, Koichiro Tanaka2,3 (1.Kyoto Univ., 2.RIKEN Center for Advanced Photonics, 3.HIKARI-COOL Kyoto, Institute for Advanced Study, Kyoto Univ.)
Keywords:
entanglement,SPDC,infrared upconversion
This presentation reports an uncertainty evaluation of quantum-state tomography for visible–mid-infrared polarization-entangled photon pairs. The density matrix is reconstructed from 16 polarization-projection measurements using maximum-likelihood estimation. To quantify the uncertainty of the reconstructed state, we perform Monte Carlo resampling that includes finite-count statistical fluctuations, accidental-coincidence subtraction, and setting-dependent normalization drift estimated from an independently measured 1030-nm pump-power trace. The analysis evaluates how these uncertainties propagate to the density-matrix elements and entanglement indicators such as purity, concurrence, and fidelity to the optimized Bell-type state.