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A Domain of Unital Channels

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Abstract

In this paper we prove the space of unital qubit channels is a Scott domain. In the process we provide a simple protocol to achieve Holevo capacity for these channels.

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Acknowledgements

The author would like to thank Keye Martin for asking the question of whether unital channels formed a domain, and for being so excited when the answer turned out to be yes.

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Authors and Affiliations

  1. Naval Research Laboratory, Washington, D.C., 20375, USA

    Johnny Feng

  2. Tulane University, New Orleans, LA, 70118, USA

    Johnny Feng

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  1. Johnny Feng
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Correspondence to Johnny Feng.

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Feng, J. A Domain of Unital Channels. Found Phys 42, 959–975 (2012). https://doi.org/10.1007/s10701-012-9656-6

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  • DOI: https://doi.org/10.1007/s10701-012-9656-6

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