Quorum of observables for universal quantum estimation
Quantum Physics
2009-11-06 v1
Abstract
Any method for estimating the ensemble average of arbitrary operator (observables or not, including the density matrix) relates the quantity of interest to a complete set of observables, i.e. a quorum}. This corresponds to an expansion on an irreducible set of operators in the Liouville space. We give two general characterizations of these sets. All the known unbiased reconstruction techniques, i.e. ``quantum tomographies'', can be described in this framework. New operatorial resolutions are given that can be used to implement novel reconstruction schemes.
Cite
@article{arxiv.quant-ph/0006006,
title = {Quorum of observables for universal quantum estimation},
author = {G. Mauro D'Ariano and Lorenzo Maccone and Matteo G. A. Paris},
journal= {arXiv preprint arXiv:quant-ph/0006006},
year = {2009}
}
Comments
Latex, no figures