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Paper Abstract and Keywords
Presentation 2015-11-24 10:20
Entanglement Generation by Communication using Phase-Squeezed Light with Photon Loss
Fumiaki Matsuoka, Akihisa Tomita (Hokkaido Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In order to implement fault-tolerant quantum computation, entanglement generation with low error probability and high success probability is required. We have proposed the use of squeezed coherent light as a probe to generate entanglement between two atoms by communication, and shown that the error probability is reduced well below the threshold of fault-tolerant quantum computation [Phys. Rev. A. {bf 88}, 022313 (2013)]. Here, we investigate the effect of photon loss mainly due to finite coupling efficiency to the cavity. The error probability with the photon loss is calculated by the beam-splitter model for homodyne measurement on probe light. Moreover, we investigate the phase-flip error for a generated entangled state due to the photon loss. Optimum condition on the amplitude of probe light and the amplitude of the squeezing to minimize the error probability with phase-flip error is examined. It is shown that the phase-squeezed probe light yields lower error probability than coherent-light probe even with photon losses. A fault-tolerant quantum computation algorithm can be implemented under 87 % transmittance by concatenating seven-qubit error correction code for phase-flip error.
Keyword (in Japanese) (See Japanese page) 
(in English) Quantum Bus / Phase-Squeezed State / / / / / /  
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Conference Information
Committee QIT  
Conference Date 2015-11-24 - 2015-11-25 
Place (in Japanese) (See Japanese page) 
Place (in English) NTT Atsugi R&D center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2015-11-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Entanglement Generation by Communication using Phase-Squeezed Light with Photon Loss 
Sub Title (in English)  
Keyword(1) Quantum Bus  
Keyword(2) Phase-Squeezed State  
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1st Author's Name Fumiaki Matsuoka  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Akihisa Tomita  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2015-11-24 10:20:00 
Presentation Time 20 minutes 
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