Quantum reliability function

Yuki Ishida, Kentaro Kato, Tsuyoshi Sasaki Usuda

Masashi Ban

Ken Masaki, Tiancheng Wang, Shogo Usami +2 more

There is a gap between properties of quantum and classical reliability functions. That is, the upper bound of the quantum reliability function diverges, whereas that of classical one does not, even if the same coherent signal is used. We are interested in the origin of this gap. In this paper, we investigate the upper bound of the reliability function for quantum signals coded by simplex codes when using square-root measurement (SRM). The reliability function in this case has a much steeper slope with respect to the rate than in the uncoded case. This result suggests the divergence of the upper bound of the quantum reliability function in the previous study.

Nils Dalarsson, Mariana Dalarsson, Leonardo Golubović

Keiko Kurokawa, Osamu Hirota

Abstract This paper discusses applications of the reliability function to specific problems in connection with communication systems transmitted by means of quantum states. The reliability function and cutoff rate for various quantum optical communication systems are specifically presented. The effects of these characteristics on the limit characteristics in the coding scheme by quantum states. © 2001 Scripta Technica, Electron Comm Jpn Pt 3, 84(9): 31–41, 2001