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Quantifying the resource content of quantum channels: an operational approach

Author(s)
Li, Lu; Bu, Kaifeng; Liu, Zi-Wen
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We propose a general method to operationally quantify the “resourcefulness” of quantum channels via channel discrimination, an important information processing task. A main result is that the maximum success probability of distinguishing a given channel from the set of free channels by free probe states is exactly characterized by the resource generating power, i.e., the maximum amount of resource produced by the action of the channel, given by the trace distance to the set of free states. We apply this framework to the resource theory of quantum coherence, as an informative example. The general results can also be easily applied to other resource theories such as entanglement, magic states, and asymmetry. ©2019
Date issued
2020-02
URI
https://hdl.handle.net/1721.1/124659
Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics; Massachusetts Institute of Technology. Department of Physics
Journal
Physical review A
Publisher
American Physical Society
Citation
Li, Lu, Kaifeng Bu, and Zi-Wen Liu, "Quantifying the resource content of quantum channels: an operational approach." Physical review A 101 (2020): no. 022335 doi 10.1103/PhysRevA.101.022335 ©2020 Author(s)
Version: Final published version
ISSN
2469-9926
2469-9934

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