On capacities of quantum channels

Masanori Ohya, D. Petz, Noboru Watanabe

Research output: Chapter in Book/Report/Conference proceedingChapter


Capacities of quantum mechanical channels are defined in terms of mutual information quantities. Geometry of the relative entropy is used to express capacity as a divergence radius. The symmetric quantum spin 1/2 channel and the attenuation channel of Boson fields are discussed as examples.

Original languageEnglish
Title of host publicationSelected Papers of M. Ohya
PublisherWorld Scientific Publishing Co.
Number of pages18
ISBN (Print)9789812794208, 9812794190, 9789812794192
Publication statusPublished - Jan 1 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ohya, M., Petz, D., & Watanabe, N. (2008). On capacities of quantum channels. In Selected Papers of M. Ohya (pp. 291-308). World Scientific Publishing Co.. https://doi.org/10.1142/9789812794208_0019