Document Detail


Optimal measurement on noisy quantum systems.
MedLine Citation:
PMID:  20366574     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We identify the optimal measurement for obtaining information about the original quantum state after the state to be measured has undergone partial decoherence due to noise. We quantify the information that can be obtained by the measurement in terms of the Fisher information and find its value for the optimal measurement. We apply our results to a quantum control scheme based on a spin-boson model.
Authors:
Yu Watanabe; Takahiro Sagawa; Masahito Ueda
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Publication Detail:
Type:  Journal Article     Date:  2010-01-15
Journal Detail:
Title:  Physical review letters     Volume:  104     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-04-06     Completed Date:  2010-06-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  020401     Citation Subset:  -    
Affiliation:
Department of Physics, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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