Document Detail

Mixed state discrimination using optimal control.
MedLine Citation:
PMID:  20366079     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We present theory and experiment for the task of discriminating two nonorthogonal states, given multiple copies. We implement several local measurement schemes, on both pure states and states mixed by depolarizing noise. We find that schemes which are optimal (or have optimal scaling) without noise perform worse with noise than simply repeating the optimal single-copy measurement. Applying optimal control theory, we derive the globally optimal local measurement strategy, which outperforms all other local schemes, and experimentally implement it for various levels of noise.
B L Higgins; B M Booth; A C Doherty; S D Bartlett; H M Wiseman; G J Pryde
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Publication Detail:
Type:  Journal Article     Date:  2009-11-24
Journal Detail:
Title:  Physical review letters     Volume:  103     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2010-04-06     Completed Date:  2010-06-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  220503     Citation Subset:  -    
Centre for Quantum Dynamics, Griffith University, Brisbane, 4111, Australia.
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