2 papers
math.FA2025
Note on Wermuth's theorem on commuting operator exponentials
Krzysztof Szczygielski
We apply Wermuth's theorem on commuting operator exponentials to show that if , being Banach space and of -congruence free spectrum, then $e^A B = B e^…
quant-ph2024
New constructive counterexamples to additivity of minimum output Rényi p-entropy of quantum channels
Krzysztof Szczygielski, MichaÅ StudziÅski
In this paper, we present new families of quantum channels for which corresponding minimum output Rényi -entropy is not additive. Our manuscript is motivated by the results of…