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Paper Abstract and Keywords
Presentation 2018-11-26 13:30
[Poster Presentation] High-threshold GKP quantum computation with realistically noisy devices
Kosuke Fukui (Kyoto Univ.), Akihisa Tomita (Hokkaido Univ.), Keisuke Fjii (Kyoto Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) To implement fault-tolerant quantum computation with continuous variables, the Gottesman--Kitaev--Preskill (GKP) qubit has been recognized as an important technological element. We have proposed a method to reduce the required squeezing level to realize large scale quantum computation with the GKP qubit [Phys. Rev. X 8, 021054 (2018)]. Although our method can reduce the required squeezing level to less than 10 dB, which is within the reach of the current experimental technology, we have assumed that the CZ gate and an efficiency of the homodyne detection are ideal. In this work, we show that the required squeezing level is around 10 dB under the realistic assumption that the CZ gate and homodyne detection degrade the squeezing level of the GKP qubits, developing a method to reduce a noise on the GKP qubit by using postselection and maximum-likelihood methods.
Keyword (in Japanese) (See Japanese page) 
(in English) quantum computation / continuous variables / Gottesman-Kitaev-Preskill (GKP) qubit / / / / /  
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Conference Information
Committee QIT  
Conference Date 2018-11-26 - 2018-11-27 
Place (in Japanese) (See Japanese page) 
Place (in English) The University of Tokyo 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2018-11-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High-threshold GKP quantum computation with realistically noisy devices 
Sub Title (in English)  
Keyword(1) quantum computation  
Keyword(2) continuous variables  
Keyword(3) Gottesman-Kitaev-Preskill (GKP) qubit  
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1st Author's Name Kosuke Fukui  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Akihisa Tomita  
2nd Author's Affiliation Hokkaido Univercity (Hokkaido Univ.)
3rd Author's Name Keisuke Fjii  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2018-11-26 13:30:00 
Presentation Time 120 minutes 
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