Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/147178
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dc.contributor.authorKechrimparis, Spirosen_US
dc.contributor.authorBae, Joonwooen_US
dc.date.accessioned2021-03-24T08:21:28Z-
dc.date.available2021-03-24T08:21:28Z-
dc.date.issued2020-
dc.identifier.citationKechrimparis, S. & Bae, J. (2020). Optimal measurement preserving qubit channels. New Journal of Physics, 22(12). https://dx.doi.org/10.1088/1367-2630/abcc9ben_US
dc.identifier.issn1367-2630en_US
dc.identifier.other0000-0002-8731-9334-
dc.identifier.other0000-0002-2345-1619-
dc.identifier.urihttps://hdl.handle.net/10356/147178-
dc.description.abstractWe consider the problem of discriminating qubit states that are sent over a quantum channel and derive a necessary and sufficient condition for an optimal measurement to be preserved by the channel. We apply the result to the characterization of optimal measurement preserving (OMP) channels for a given qubit ensemble, e.g., a set of two states or a set of multiple qubit states with equal a priori probabilities. Conversely, we also characterize qubit ensembles for which a given channel is OMP, such as unitary and depolarization channels. Finally, we show how the sets of OMP channels for a given ensemble can be constructed.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.language.isoenen_US
dc.relationNRF-NRFF2016-02en_US
dc.relationMOE2017-T1-002-043en_US
dc.relation.ispartofNew Journal of Physicsen_US
dc.rights© 2020 The Author(s). Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en_US
dc.subjectScience::Physicsen_US
dc.titleOptimal measurement preserving qubit channelsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.identifier.doi10.1088/1367-2630/abcc9b-
dc.description.versionPublished versionen_US
dc.identifier.scopus2-s2.0-85099351451-
dc.identifier.issue12en_US
dc.identifier.volume22en_US
dc.subject.keywordsQuantum State Discriminationen_US
dc.subject.keywordsQuantum Channelsen_US
dc.description.acknowledgementThe authors acknowledge support by the National Research Foundation of Korea (O2N-Q2A 2019M3E4A1080001, NRF2017R1E1A1A03069961), the KIST Institutional Programs (2E30620-20-056), and the ITRC Program (IITP-2020-2018-0-01402); the National Research Foundation (NRF), Singapore, under its NRFF Fellow programme (Award No. NRF-NRFF2016-02), Singapore Ministry of Education Tier 1 Grants No. MOE2017-T1-002-043 and No. FQXi-RFP-1809 from the Foundational Questions Institute and Fetzer Franklin Fund (a donor-advised fund of Silicon Valley Community Foundation). Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of National Research Foundation, Singapore.en_US
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