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Conference Paper: Getting information on independently prepared quantum states: when are individual measurements as powerful as joint measurements?

TitleGetting information on independently prepared quantum states: when are individual measurements as powerful as joint measurements?
Authors
KeywordsAstronomy
Issue Date2009
PublisherAmerican Astronomical Society. The Journal's web site is located at http://www.aas.org/publications/baas/baas.html
Citation
The 2009 March Meeting of the American Physical Society (APS), Pittsburgh, PA., 16-20 March 2009. In Bulletin of the American Astronomical Society, 2009, v. 54 n. 1, abstract:: Y17.00004 How to Cite?
AbstractGiven a composite quantum system in which the states of the subsystems are independently (but not necessarily identically) prepared, we construct separate measurements on the subsystems from any given joint measurement such that the former always give at least as large information as the latter. This construction offers new insights into the understanding of measurements on this type of composite systems. Moreover, this construction essentially proves the intuition that separate measurements on the subsystems are sufficient to extract the maximal information about the separately prepared subsystems, thus making a joint measurement unnecessary. Furthermore, our result implies that individual attacks are as powerful as collective attacks in obtaining information on the raw key in quantum key distribution.
DescriptionSession Y17: Focus Session: Quantum Metrology and Nanomechanics: abstract ID: BAPS.2009.MAR.Y17.4
Persistent Identifierhttp://hdl.handle.net/10722/165682
ISSN

 

DC FieldValueLanguage
dc.contributor.authorFung, FCHen_US
dc.contributor.authorChau, HFen_US
dc.date.accessioned2012-09-20T08:22:12Z-
dc.date.available2012-09-20T08:22:12Z-
dc.date.issued2009en_US
dc.identifier.citationThe 2009 March Meeting of the American Physical Society (APS), Pittsburgh, PA., 16-20 March 2009. In Bulletin of the American Astronomical Society, 2009, v. 54 n. 1, abstract:: Y17.00004en_US
dc.identifier.issn0002-7537-
dc.identifier.urihttp://hdl.handle.net/10722/165682-
dc.descriptionSession Y17: Focus Session: Quantum Metrology and Nanomechanics: abstract ID: BAPS.2009.MAR.Y17.4-
dc.description.abstractGiven a composite quantum system in which the states of the subsystems are independently (but not necessarily identically) prepared, we construct separate measurements on the subsystems from any given joint measurement such that the former always give at least as large information as the latter. This construction offers new insights into the understanding of measurements on this type of composite systems. Moreover, this construction essentially proves the intuition that separate measurements on the subsystems are sufficient to extract the maximal information about the separately prepared subsystems, thus making a joint measurement unnecessary. Furthermore, our result implies that individual attacks are as powerful as collective attacks in obtaining information on the raw key in quantum key distribution.-
dc.languageengen_US
dc.publisherAmerican Astronomical Society. The Journal's web site is located at http://www.aas.org/publications/baas/baas.html-
dc.relation.ispartofBulletin of the American Astronomical Societyen_US
dc.rightsBulletin of the American Astronomical Society. Copyright © American Astronomical Society.-
dc.subjectAstronomy-
dc.titleGetting information on independently prepared quantum states: when are individual measurements as powerful as joint measurements?en_US
dc.typeConference_Paperen_US
dc.identifier.emailFung, FCH: chffung@hku.hken_US
dc.identifier.emailChau, HF: hfchau@hku.hken_US
dc.identifier.authorityChau, HF=rp00669en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.hkuros207105en_US
dc.identifier.volume54-
dc.identifier.issue1-
dc.publisher.placeUnited States-
dc.description.otherThe 2009 March Meeting of the American Physical Society (APS), Pittsburgh, PA., 16-20 March 2009. In Bulletin of the American Astronomical Society, 2009, v. 54 n. 1, abstract:: Y17.00004-

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