Coexistence of quantum operations
Quantum Physics
2009-08-21 v2
Abstract
Quantum operations are used to describe the observed probability distributions and conditional states of the measured system. In this paper, we address the problem of their joint measurability (coexistence). We derive two equivalent coexistence criteria. The two most common classes of operations - Luders operations and conditional state preparators - are analyzed. It is shown that Luders operations are coexistent only under very restrictive conditions, when the associated effects are either proportional to each other, or disjoint.
Cite
@article{arxiv.0905.4953,
title = {Coexistence of quantum operations},
author = {Teiko Heinosaari and Daniel Reitzner and Peter Stano and Mario Ziman},
journal= {arXiv preprint arXiv:0905.4953},
year = {2009}
}
Comments
14 pages, 1 figure, minor changes and corrections in v2