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Paper Abstract and Keywords
Presentation 2017-05-30 14:30
Phase estimation problem in open quantum systems with nuisance parameters -- An analysis on the memory effect and achievability of the quantum Cramer-Rao bound --
Jun Suzuki (UEC)
Abstract (in Japanese) (See Japanese page) 
(in English) We study the phase estimation problem in open quantum systems based the master equation approach. It is shown that the quantum Cramer-Rao bound is significantly different when the value of noise parameters cannot be determined without uncertainty. As a concrete realistic example, we analyze the phase estimation of
a single spin-state, which is affected by random magnetic fields. We show that the effect of nuisance parameters are not negligible even in the weak-coupling limit. We also demonstrate that a memory effect, which is due to a time-dependent kernel for the master equation, is an artifact of improper analysis for the problem.
Keyword (in Japanese) (See Japanese page) 
(in English) Phase estimation / open quantum systems / nuisance parameter / quantum Cramer-Rao bound / / / /  
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Conference Information
Committee QIT  
Conference Date 2017-05-29 - 2017-05-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Ritesumeikan University, Suzaku Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2017-05-QIT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Phase estimation problem in open quantum systems with nuisance parameters 
Sub Title (in English) An analysis on the memory effect and achievability of the quantum Cramer-Rao bound 
Keyword(1) Phase estimation  
Keyword(2) open quantum systems  
Keyword(3) nuisance parameter  
Keyword(4) quantum Cramer-Rao bound  
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1st Author's Name Jun Suzuki  
1st Author's Affiliation University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2017-05-30 14:30:00 
Presentation Time 20 minutes 
Registration for QIT 
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