FEC coding for QKD at higher photon flux levels based on spatial entanglement of twin beams in PDC

win beams generated by Parametric Down Conversion (PDC) exhibit quantum correlations that have been effectively used for calibration of single photon detectors and Charge Coupled Device (CCD) cameras [1]. The natural setup of quantization of CCD detection area and measurement of the correlation statistic needed to detect the presence of the eavesdropper Eve leads to a set of QKD parallel channel models that are non-binary Discrete Memoryless Channels (DMC). This work explores Forward Error Correction (FEC) coding for information reconciliation over the resulting parallel DMCs. [1] I. P. Degiovanni M. Genovese M.Gramegna A. Avella, G. Brida and P. Traina. Phys. Rev. A, 82:062309, 2010.