English

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