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Paper Abstract and Keywords
Presentation 2013-11-18 00:00
[Poster Presentation] Evaluation of the phase correlation between the optical pulses for transmission in quantum key distribution at 10 GHz
Toshiya Kobayashi, Akihisa Tomita, Atsushi Okamoto (Hokkaido Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Quantum key distribution (BB84) using a weak coherent state light source have been shown secure on the assumption that the phase correlation does not exist between the optical pulses for transmission. We used an asymmetric Mach-Zehnder interferometer and evaluated quantitatively the phase correlation using visibility of the interference fringe between adjacent pulses. We experimentally confirmed that the phase correlation does not appear between optical pulses even at 10 GHz clock frequency if the DC bias current value of gain-switched operation is sufficiently small.
Keyword (in Japanese) (See Japanese page) 
(in English) quantum cryptography / QKD / BB84 / weak coherent state / optical pulse / phase correlation / 10GHz clock frequency /  
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Conference Information
Committee QIT  
Conference Date 2013-11-18 - 2013-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Waseda Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2013-11-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of the phase correlation between the optical pulses for transmission in quantum key distribution at 10 GHz 
Sub Title (in English)  
Keyword(1) quantum cryptography  
Keyword(2) QKD  
Keyword(3) BB84  
Keyword(4) weak coherent state  
Keyword(5) optical pulse  
Keyword(6) phase correlation  
Keyword(7) 10GHz clock frequency  
Keyword(8)  
1st Author's Name Toshiya Kobayashi  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Akihisa Tomita  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Atsushi Okamoto  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2013-11-18 00:00:00 
Presentation Time minutes 
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