5 citations · 9 across the 4 of their papers we have counts for
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math-ph2020
Quantifier elimination theory and maps which preserve semipositivity
Grzegorz Pastuszak, Adam Skowyrski, Andrzej Jamiołkowski
We give an algorithm determining whether a hermiticity-preserving superoperator is positive. In our approach we apply techniques of quantifier elimination theory for real numbers.…
math-ph2020
On maps which preserve semipositivity and quantifier elimination theory for real numbers
Grzegorz Pastuszak, Adam Skowyrski, Andrzej Jamiołkowski
Assume that is a superoperator which preserves hermiticity. We give an algorithm determining whether preserv…
math-ph2017★ 5 cited
Application of Shemesh theorem to quantum channels
Michał Białończyk, Andrzej Jamiołkowski, Karol Życzkowski
Completely positive maps are useful in modeling the discrete evolution of quantum systems. Spectral properties of operators associated with such maps are relevant for determining t…