Binary discretization for quantum continuous channels
Masaki Sohma, Osamu Hirota · Physical Review A · 2000
This paper discusses a discretization problem for quantum continuous channels. We show that the binary discretization asymptotically realizes the capacity and the maximum mutual information; the classical continuous channel does not have such an asymptotic property. We further clarify the significance of Gordon's result from the aspect of binary discretization for the maximum mutual information.