arXiv:1006.0734 [quant-ph]AbstractReferencesReviewsResources
Phase estimation without a priori knowledge in the presence of loss
Jan Kolodynski, Rafal Demkowicz-Dobrzanski
Published 2010-06-03, updated 2010-11-08Version 3
We find the optimal scheme for quantum phase estimation in the presence of loss when no a priori knowledge on the estimated phase is available. We prove analytically an explicit lower bound on estimation uncertainty, which shows that, as a function of number of probes, quantum precision enhancement amounts at most to a constant factor improvement over classical strategies
Comments: 8 pages, 2 figures, discussion on adaptive strategies added
Journal: Phys. Rev. A 82, 053804 (2010)
Categories: quant-ph
Keywords: priori knowledge, quantum precision enhancement amounts, explicit lower bound, quantum phase estimation, constant factor improvement
Tags: journal article
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