Superadditivity of Quantum Channel Coding Rate With Finite Blocklength Joint Measurements

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dc.contributor.authorChung, Hye Wonko
dc.contributor.authorGuha, Saikatko
dc.contributor.authorZheng, Lizhongko
dc.date.accessioned2017-07-04T02:26:19Z-
dc.date.available2017-07-04T02:26:19Z-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.issued2016-10-
dc.identifier.citationIEEE TRANSACTIONS ON INFORMATION THEORY, v.62, no.10, pp.5938 - 5959-
dc.identifier.issn0018-9448-
dc.identifier.urihttp://hdl.handle.net/10203/224574-
dc.description.abstractThe maximum rate at which classical information can be reliably transmitted per use of a quantum channel strictly increases in general with N, the number of channel outputs that are detected jointly by the quantum joint-detection receiver (JDR). This phenomenon is known as superadditivity of the maximum achievable information rate over a quantum channel. We study this phenomenon for a pure-state classical-quantum channel and provide a lower bound on C-N/N, the maximum information rate when the JDR is restricted to making joint measurements over no more than N quantum channel outputs, while allowing arbitrary classical error correction. We also show the appearance of a superadditivity phenomenon-of mathematical resemblance to the aforesaid problem-in the channel capacity of a classical discrete memoryless channel when a concatenated coding scheme is employed, and the inner decoder is forced to make hard decisions on N-length inner codewords. Using this correspondence, we develop a unifying framework for the above two notions of superadditivity, and show that for our lower bound to C-N/N to be equal to a given fraction of the asymptotic capacity C of the respective channel, N must be proportional to V/C-2, where V is the respective channel dispersion quantity.-
dc.languageEnglish-
dc.publisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC-
dc.titleSuperadditivity of Quantum Channel Coding Rate With Finite Blocklength Joint Measurements-
dc.typeArticle-
dc.identifier.wosid000384304600037-
dc.identifier.scopusid2-s2.0-84988664759-
dc.type.rimsART-
dc.citation.volume62-
dc.citation.issue10-
dc.citation.beginningpage5938-
dc.citation.endingpage5959-
dc.citation.publicationnameIEEE TRANSACTIONS ON INFORMATION THEORY-
dc.identifier.doi10.1109/TIT.2016.2597285-
dc.contributor.localauthorChung, Hye Won-
dc.contributor.nonIdAuthorGuha, Saikat-
dc.contributor.nonIdAuthorZheng, Lizhong-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorPure-state classical input-quantum output (cq) channel-
dc.subject.keywordAuthorHolevo capacity-
dc.subject.keywordAuthorsuperadditivity of capacity-
dc.subject.keywordAuthorjoint measurement-
dc.subject.keywordAuthorconcatenated codes-
dc.subject.keywordPlusCLASSICAL CAPACITY-
dc.subject.keywordPlusSIGNAL STATES-
dc.subject.keywordPlusINFORMATION-
dc.subject.keywordPlusCOMMUNICATION-
dc.subject.keywordPlusBOUNDS-
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