Quantum estimation of detection efficiency with no-knowledge quantum feedback
Quantum Physics
2019-08-13 v1 Systems and Control
Abstract
We investigate that no-knowledge measurement-based feedback control is utilized to obtain the estimation precision of the detection efficiency. For the feedback operators that concern us, no-knowledge measurement is the optimal way to estimate the detection efficiency. We show that the higher precision can be achieved for the lower or larger detection efficiency. It is found that no-knowledge feedback can be used to cancel decoherence. No-knowledge feedback with a high detection efficiency can perform well in estimating frequency and detection efficiency parameters simultaneously. And simultaneous estimation is better than independent estimation given by the same probes.
Keywords
Cite
@article{arxiv.1708.04540,
title = {Quantum estimation of detection efficiency with no-knowledge quantum feedback},
author = {Dong Xie and Chunling Xu and Jianyong Chen and Anmin Wang},
journal= {arXiv preprint arXiv:1708.04540},
year = {2019}
}
Comments
7pages, 3figures