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Paper Abstract and Keywords
Presentation 2018-11-26 13:30
[Poster Presentation] Quantum Metrology in the Presence of Unknown Background Parameters
Masaya Shintoku, Teruo Matsubara, Kazuya Yuasa (Waseda Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) We discuss quantum metrology in the presence of some background. We treat the parameters characterizing the background as unknown parameters, and evaluate the precision of the estimation of a target parameter in the framework for multiparameter estimation. As simple examples, we consider typical phase estimation problems: the estimation of a precession angle of a quantum spin and the estimation of an optical phase shift. While the presence of some background might hinder us from estimating the target parameter, we try to circumvent the difficulty by employing a "blank test" to probe only the background parameters. Moreover, we show that entanglement between the probe for the target and the probe for the reference can enhance the precision of the estimation of the target parameter.
Keyword (in Japanese) (See Japanese page) 
(in English) quantum metrology / quantum parameter estimation / quantum Fisher information / blank test / entanglement / / /  
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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) Quantum Metrology in the Presence of Unknown Background Parameters 
Sub Title (in English)  
Keyword(1) quantum metrology  
Keyword(2) quantum parameter estimation  
Keyword(3) quantum Fisher information  
Keyword(4) blank test  
Keyword(5) entanglement  
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1st Author's Name Masaya Shintoku  
1st Author's Affiliation Waseda University (Waseda Univ.)
2nd Author's Name Teruo Matsubara  
2nd Author's Affiliation Waseda University (Waseda Univ.)
3rd Author's Name Kazuya Yuasa  
3rd Author's Affiliation Waseda University (Waseda Univ.)
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Speaker Author-1 
Date Time 2018-11-26 13:30:00 
Presentation Time 120 minutes 
Registration for QIT 
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