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Conference Paper: Universal squash model for optical communications using linear optics and threshold detectors

TitleUniversal squash model for optical communications using linear optics and threshold detectors
Authors
Issue Date2011
PublisherDepartment of Applied Mathematics, The Hong Kong Polytechnic University.
Citation
The 2nd Workshop on Quantum Information Science, Department of Applied Mathematics, The Hong Kong Polytechnic University, Hong Kong, 4-5 January 2011. How to Cite?
AbstractQuantum communications often rely on single photons as information carriers in order to exploit their quantum mechanical properties. However, practical detectors are often threshold detectors that are incapable of resolving the number of photons received. This apparently subtle issue has surprisingly immense implication to many quantum communications protocols. In fact, it has been shown that this issue leads to many problems including fake violation of Bell's inequality, insecurity of quantum key distribution, and false entanglement verification. The source of these problems is the discrepancy between the theoretical consideration where single-photon signals are assumed and the actual experiments where multi-photon signals may be detected. We report a universal solution to bridge this gap between theory and experiments.
Persistent Identifierhttp://hdl.handle.net/10722/165679

 

DC FieldValueLanguage
dc.contributor.authorFung, FCHen_US
dc.contributor.authorChau, HFen_US
dc.contributor.authorLo, HKen_US
dc.date.accessioned2012-09-20T08:22:11Z-
dc.date.available2012-09-20T08:22:11Z-
dc.date.issued2011en_US
dc.identifier.citationThe 2nd Workshop on Quantum Information Science, Department of Applied Mathematics, The Hong Kong Polytechnic University, Hong Kong, 4-5 January 2011.en_US
dc.identifier.urihttp://hdl.handle.net/10722/165679-
dc.description.abstractQuantum communications often rely on single photons as information carriers in order to exploit their quantum mechanical properties. However, practical detectors are often threshold detectors that are incapable of resolving the number of photons received. This apparently subtle issue has surprisingly immense implication to many quantum communications protocols. In fact, it has been shown that this issue leads to many problems including fake violation of Bell's inequality, insecurity of quantum key distribution, and false entanglement verification. The source of these problems is the discrepancy between the theoretical consideration where single-photon signals are assumed and the actual experiments where multi-photon signals may be detected. We report a universal solution to bridge this gap between theory and experiments.-
dc.languageengen_US
dc.publisherDepartment of Applied Mathematics, The Hong Kong Polytechnic University.-
dc.relation.ispartof2nd Workshop on Quantum Information Science, Department of Applied Mathematics, The Hong Kong Polytechnic Universityen_US
dc.titleUniversal squash model for optical communications using linear optics and threshold detectorsen_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.hkuros207101en_US
dc.publisher.placeHong Kong-

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