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@article{860295,
author = {Ziman, Mário and Heinosaari, Teiko and Reitzner, Daniel and Stano, Peter},
article_number = {36},
keywords = {Quantum information processing; quantum operations},
language = {eng},
issn = {1751-8113},
journal = {Journal of Physics A: Mathematical and Theoretical},
title = {Coexistence of quantum operations},
url = {http://arxiv.org/abs/0905.4953},
volume = {42},
year = {2009}
}
TY - JOUR
ID - 860295
AU - Ziman, Mário - Heinosaari, Teiko - Reitzner, Daniel - Stano, Peter
PY - 2009
TI - Coexistence of quantum operations
JF - Journal of Physics A: Mathematical and Theoretical
VL - 42
IS - 36
SN - 17518113
KW - Quantum information processing
KW - quantum operations
UR - http://arxiv.org/abs/0905.4953
N2 - 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.
ER -
ZIMAN, Mário, Teiko HEINOSAARI, Daniel REITZNER a Peter STANO. Coexistence of quantum operations. \textit{Journal of Physics A: Mathematical and Theoretical}. 2009, roč.~42, č.~36, 14 s. ISSN~1751-8113.
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