On characterizations of bistochastic Kadison-Schwarz operators on $M_2(\mathbb{C})$

Farrukh Mukhamedov, Hasan Akin

In this paper we describe bistochastic Kadison-Schawrz operators acting on $M_2(\mathbb{C})$. Such a description allows us to find positive, but not Kadison-Schwarz operators. More…