Toward a “soft” output quantum channel via Bayesian estimation
Stefano Olivares, Matteo G. A. Paris, Maria Delgado, M. Mondin · 2010
We propose a feasible scheme to realize a soft output quantum channel useful for soft-metric-based information reconciliation protocols for quantum key distribution. Our proposal relies on optical qubits encoded into the polarization degree of freedom of coherent states and Bayesian estimation in non-asymptotic regime at the detection stage. We also consider the presence of non-dissipative noise during the propagation.