Realization of a collective decoding of code-word states
Masahide Sasaki, Tsuyoshi Sasaki-Usuda, Masayuki Izutsu, Osamu Hirota · Physical Review A · 1998
A physical model for the optimum collective decoding that attains the minimum average error probability in distinguishing code-word states is presented. This model is based on a cavity QED technique which is available at present. It will open a possibility for a quantum decoder that realizes the superadditivity in classical capacity of quantum channel which was demonstrated in M. Sasaki, preceeding paper, Phys. Rev. A 58, 146 (1998).