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Article: A balanced homodyne detector for high-rate Gaussian-modulated coherent-state quantum key distribution

TitleA balanced homodyne detector for high-rate Gaussian-modulated coherent-state quantum key distribution
Authors
Issue Date2011
Citation
New Journal of Physics, 2011, v. 13, article no. 013003 How to Cite?
AbstractWe discuss the excess noise contributions of a practical balanced homodyne detector (BHD) in Gaussian-modulated coherent-state (GMCS) quantum key distribution (QKD). We point out that the key generated from the original realistic model of GMCS QKD may not be secure. In our refined realistic model, we take into account excess noise due to the finite bandwidth of the homodyne detector and the fluctuation of the local oscillator (LO). A high-speed BHD suitable for GMCS QKD in the telecommunication wavelength region is built and experimentally tested. The 3 dB bandwidth of the BHD is found to be 104 MHz and its electronic noise level is 13 dB below the shot noise at an LO level of 8.5 × 108 photons per pulse. The secure key rate of a GMCS QKD experiment with this homodyne detector is expected to reach Mbits s-1 over a few kilometers. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Persistent Identifierhttp://hdl.handle.net/10722/285925
ISSN
2020 Impact Factor: 3.729
2020 SCImago Journal Rankings: 1.584
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChi, Yue Meng-
dc.contributor.authorQi, Bing-
dc.contributor.authorZhu, Wen-
dc.contributor.authorQian, Li-
dc.contributor.authorLo, Hoi Kwong-
dc.contributor.authorYoun, Sun Hyun-
dc.contributor.authorLvovsky, A. I.-
dc.contributor.authorTian, Liang-
dc.date.accessioned2020-08-18T04:57:00Z-
dc.date.available2020-08-18T04:57:00Z-
dc.date.issued2011-
dc.identifier.citationNew Journal of Physics, 2011, v. 13, article no. 013003-
dc.identifier.issn1367-2630-
dc.identifier.urihttp://hdl.handle.net/10722/285925-
dc.description.abstractWe discuss the excess noise contributions of a practical balanced homodyne detector (BHD) in Gaussian-modulated coherent-state (GMCS) quantum key distribution (QKD). We point out that the key generated from the original realistic model of GMCS QKD may not be secure. In our refined realistic model, we take into account excess noise due to the finite bandwidth of the homodyne detector and the fluctuation of the local oscillator (LO). A high-speed BHD suitable for GMCS QKD in the telecommunication wavelength region is built and experimentally tested. The 3 dB bandwidth of the BHD is found to be 104 MHz and its electronic noise level is 13 dB below the shot noise at an LO level of 8.5 × 108 photons per pulse. The secure key rate of a GMCS QKD experiment with this homodyne detector is expected to reach Mbits s-1 over a few kilometers. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.-
dc.languageeng-
dc.relation.ispartofNew Journal of Physics-
dc.titleA balanced homodyne detector for high-rate Gaussian-modulated coherent-state quantum key distribution-
dc.typeArticle-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1088/1367-2630/13/1/013003-
dc.identifier.scopuseid_2-s2.0-79251550127-
dc.identifier.volume13-
dc.identifier.spagearticle no. 013003-
dc.identifier.epagearticle no. 013003-
dc.identifier.isiWOS:000288903600003-
dc.identifier.issnl1367-2630-

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