Estimates of non-optimality of quantum measurements and a simple iterative method for computing optimal measurements
Quantum Physics
2009-02-15 v2
Abstract
We construct crude estimates for non-optimality of quantum measurements in terms of their violation of Holevo's simplified minimum-error optimality conditions. As an application, we show that a modification of Barnett and Croke's proof of the optimality conditions yields a convergent iterative scheme for computing optimal measurements.
Keywords
Cite
@article{arxiv.0902.0395,
title = {Estimates of non-optimality of quantum measurements and a simple iterative method for computing optimal measurements},
author = {Jon Tyson},
journal= {arXiv preprint arXiv:0902.0395},
year = {2009}
}
Comments
The optimality condition in the prevoius version had already been shown by Holevo. The bounds on non-optimality and convergence of the iterative algorithm are unchanged