Quantum Metrology Assisted with Abstention
Quantum Physics
2013-05-31 v2
Abstract
The main goal of quantum metrology is to obtain accurate values of physical parameters using quantum probes. In this context, we show that abstention, i.e., the possibility of getting an inconclusive answer at readout, can drastically improve the measurement precision. We focus on phase estimation and quantify the required amount of abstention for a given precision. We also develop analytical tools to obtain the asymptotic behavior of the precision and required rate of abstention for arbitrary pure qubit states.
Cite
@article{arxiv.1209.5736,
title = {Quantum Metrology Assisted with Abstention},
author = {B. Gendra and E. Ronco-Bonvehi and J. Calsamiglia and R. Munoz-Tapia and E. Bagan},
journal= {arXiv preprint arXiv:1209.5736},
year = {2013}
}
Comments
Some typos corrected