Phase estimation without a priori knowledge in the presence of loss
Quantum Physics
2010-11-09 v3
Abstract
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
Cite
@article{arxiv.1006.0734,
title = {Phase estimation without a priori knowledge in the presence of loss},
author = {Jan Kolodynski and Rafal Demkowicz-Dobrzanski},
journal= {arXiv preprint arXiv:1006.0734},
year = {2010}
}
Comments
8 pages, 2 figures, discussion on adaptive strategies added