Showing papers on "Coherent information published in 1985"
TL;DR: In this article, the authors briefly review the mathematical formulation of quantum communication theory and construct a physical model of the optical fiber communication process in order to examine the qualitative properties of the communication channel.
Abstract: The communication of information by means of laser is an important technique. Therefore, it is necessary to construct a communication theory (quantum information theory) including quantum effects of laser action. Ohya, one of the authors, has studied the quantum communication channel and constructed a compound state for systematic formulation of the mutual information in quantum systems. In this paper, (1) we briefly review the mathematical formulation of quantum communication theory and (2) construct a physical model of the optical fiber communication process in order to examine the qualitative properties of the communication channel.
36 citations
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TL;DR: In this article, some issues are raised concerning entropy-maximizing and information-theoretical approaches to spatial distribution modeling, and it is argued that approaches based on information theory and the minimum-information principle may not always be satisfactory because they may not take into account all the known information characterizing the spatial system.
Abstract: In this paper, some issues are raised concerning entropy-maximizing and information-theoretical approaches to spatial distribution modelling It is argued that approaches based on information theory and the minimum-information principle may not always be satisfactory because they may not take into account all the known information characterizing the spatial system It is concluded that this approach is not appropriate as a basis upon which to derive spatial distribution models
14 citations