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Conference Paper: Getting information on independently prepared quantum states: when are individual measurements as powerful as joint measurements?
Title | Getting information on independently prepared quantum states: when are individual measurements as powerful as joint measurements? |
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Authors | |
Keywords | Astronomy |
Issue Date | 2009 |
Publisher | American 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? |
Abstract | Given 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. |
Description | Session Y17: Focus Session: Quantum Metrology and Nanomechanics: abstract ID: BAPS.2009.MAR.Y17.4 |
Persistent Identifier | http://hdl.handle.net/10722/165682 |
ISSN |
DC Field | Value | Language |
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dc.contributor.author | Fung, FCH | en_US |
dc.contributor.author | Chau, HF | en_US |
dc.date.accessioned | 2012-09-20T08:22:12Z | - |
dc.date.available | 2012-09-20T08:22:12Z | - |
dc.date.issued | 2009 | en_US |
dc.identifier.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 | en_US |
dc.identifier.issn | 0002-7537 | - |
dc.identifier.uri | http://hdl.handle.net/10722/165682 | - |
dc.description | Session Y17: Focus Session: Quantum Metrology and Nanomechanics: abstract ID: BAPS.2009.MAR.Y17.4 | - |
dc.description.abstract | Given 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.language | eng | en_US |
dc.publisher | American Astronomical Society. The Journal's web site is located at http://www.aas.org/publications/baas/baas.html | - |
dc.relation.ispartof | Bulletin of the American Astronomical Society | en_US |
dc.rights | Bulletin of the American Astronomical Society. Copyright © American Astronomical Society. | - |
dc.subject | Astronomy | - |
dc.title | Getting information on independently prepared quantum states: when are individual measurements as powerful as joint measurements? | en_US |
dc.type | Conference_Paper | en_US |
dc.identifier.email | Fung, FCH: chffung@hku.hk | en_US |
dc.identifier.email | Chau, HF: hfchau@hku.hk | en_US |
dc.identifier.authority | Chau, HF=rp00669 | en_US |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.hkuros | 207105 | en_US |
dc.identifier.volume | 54 | - |
dc.identifier.issue | 1 | - |
dc.publisher.place | United States | - |
dc.description.other | 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 | - |
dc.identifier.issnl | 0002-7537 | - |