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Paper Abstract and Keywords
Presentation 2015-05-25 12:00
Spin Amplification with inhomogeneous broadening
Suguru Endo (Keio Univ), Yuichiro Matsuzaki, W . J. Munro, Hiroshi Yamaguchi, Shiro Saito (NTT BRL)
Abstract (in Japanese) (See Japanese page) 
(in English) Long-lived qubits do not easily couple with a measurement apparatus because they are usually well-isolated from
any other system. There is sometimes difficulty in implementing reliable projective measurements on such long-lived qubits.
Spin amplification using many ancillary qubit, where the ancillary-qubits state changes depending on the target-qubit state,
is one of the promising ways to construct a high-fidelity measurement on such a system. We show that a fast and accurate
amplification is possible even in the presence of the inhomogeneity of the coupling and frequency of the ancillary qubits. The
scheme can be realized with a simple experimental setup where the target qubit is collectively coupled with many ancillary
qubits. Our scheme is robust against realistic imperfections so that this could provide a new way to readout a single spin that
could not have been measured in the previous approaches.
Keyword (in Japanese) (See Japanese page) 
(in English) Spin Amplification / Inhomogeneous Broadening / Ancillary qubits / Target qubit / / / /  
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Conference Information
Committee QIT  
Conference Date 2015-05-25 - 2015-05-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2015-05-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Spin Amplification with inhomogeneous broadening 
Sub Title (in English)  
Keyword(1) Spin Amplification  
Keyword(2) Inhomogeneous Broadening  
Keyword(3) Ancillary qubits  
Keyword(4) Target qubit  
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1st Author's Name Suguru Endo  
1st Author's Affiliation Keio University (Keio Univ)
2nd Author's Name Yuichiro Matsuzaki  
2nd Author's Affiliation NTT Basic Research Laboratory (NTT BRL)
3rd Author's Name W . J. Munro  
3rd Author's Affiliation NTT Basic Research Laboratory (NTT BRL)
4th Author's Name Hiroshi Yamaguchi  
4th Author's Affiliation NTT Basic Research Laboratory (NTT BRL)
5th Author's Name Shiro Saito  
5th Author's Affiliation NTT Basic Research Laboratory (NTT BRL)
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Speaker Author-1 
Date Time 2015-05-25 12:00:00 
Presentation Time 20 minutes 
Registration for QIT 
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