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Paper Abstract and Keywords
Presentation 2023-05-30 15:50
General treatment of trusted receiver noise in continuous variable quantum key distribution
Shinichiro Yamano (UT), Takaya Matsuura (RMIT University), Yui Kuramochi (Kyushu Univ.), Toshihiko Sasaki, Masato Koashi (UT)
Abstract (in Japanese) (See Japanese page) 
(in English) Continuous Variable (CV) quantum key distribution (QKD) is a promising candidate for practical implementations due to its compatibility with the existing communication technology. A trusted device scenario assuming that an adversary has no access to imperfections in the detector is expected to provide significant improvement in the key rate, but such an endeavor so far was made separately for specific protocols and for specific proof techniques. Here, we develop a simple and general treatment that can incorporate the effects of Gaussian trusted noises for any protocol that uses homodyne/heterodyne measurements. In our method, a rescaling of the outcome of a noisy homodyne/heterodyne detector renders it equivalent to the outcome of a noiseless detector with a tiny additional loss, thanks to a noise-loss equivalence well-known in quantum optics. Since this method is independent of protocols and security proofs, it is applicable to Gaussian-modulation and discrete-modulation protocols and to any proof techniques developed so far and yet to be discovered as well.
Keyword (in Japanese) (See Japanese page) 
(in English) Quantum Cryptography / continuous variable quantum key distribution / trusted noise / / / / /  
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Conference Information
Committee QIT  
Conference Date 2023-05-29 - 2023-05-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Katsura Campus, Kyoto University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2023-05-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) General treatment of trusted receiver noise in continuous variable quantum key distribution 
Sub Title (in English)  
Keyword(1) Quantum Cryptography  
Keyword(2) continuous variable quantum key distribution  
Keyword(3) trusted noise  
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1st Author's Name Shinichiro Yamano  
1st Author's Affiliation The University of Tokyo (UT)
2nd Author's Name Takaya Matsuura  
2nd Author's Affiliation RMIT University (RMIT University)
3rd Author's Name Yui Kuramochi  
3rd Author's Affiliation Kyushu University (Kyushu Univ.)
4th Author's Name Toshihiko Sasaki  
4th Author's Affiliation The University of Tokyo (UT)
5th Author's Name Masato Koashi  
5th Author's Affiliation The University of Tokyo (UT)
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Speaker Author-1 
Date Time 2023-05-30 15:50:00 
Presentation Time 15 minutes 
Registration for QIT 
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