Channel steering

Piani, Marco (2015) Channel steering. Journal of the Optical Society of America B, 32 (4). A1-A7. ISSN 0740-3224 (https://doi.org/10.1364/JOSAB.32.0000A1)

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Abstract

We introduce and study the notion of steerability for channels. This generalizes the notion of steerability of bipartite quantum states. We discuss a key conceptual difference between the case of states and the case of channels: while state steering deals with the notion of "hidden" states, steerability in the channel case is better understood in terms of coherence of channel extensions, rather than in terms of "hidden" channels. This distinction vanishes in the case of states. We further argue how the proposed notion of lack of coherence of channel extensions coincides with the notion of channel extensions realized via local operations and classical communication. We also discuss how the Choi-Jamiolkowski isomorphism allows the direct application of many results about states to the case of channels. We introduce measures for the steerability of channel extensions.

  • Item type:Article
    ID code:50415
    Dates:
    Date
    Event
    2015
    Published
    24 December 2014
    Accepted
    Notes:This paper was published in Journal of the Optical Society of America B and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josab/. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:18 Nov 2014 09:58
    Last modified:19 Apr 2024 00:15
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/50415
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