Optimal parameter estimation of depolarizing channel
Quantum Physics
2009-11-07 v1
Abstract
We investigate strategies for estimating a depolarizing channel for a finite dimensional system. Our analysis addresses the double optimization problem of selecting the best input probe state and the measurement strategy that minimizes the Bayes cost of a quadratic function. In the qubit case, we derive the Bayes optimal strategy for any finite number of input probe particles when bipartite entanglement can be formed in the probe particles.
Cite
@article{arxiv.quant-ph/0203113,
title = {Optimal parameter estimation of depolarizing channel},
author = {Masahide Sasaki and Masashi Ban and Stephen M. Barnett},
journal= {arXiv preprint arXiv:quant-ph/0203113},
year = {2009}
}
Comments
7 pages, RevTeX4, 5 figures