On description of bistochastic Kadison-Schwarz operators on M_2(C)

Details On description of bistochastic Kadison-Schwarz operators on M_2(C) On description of bistochastic Kadison-Schwarz operators on M_2(C)

2010-05-30

arxiv.org/abs/1005.5532v1

Open Systems & Information Dynamics Vol. 17, No. 3 (2010) 245-253

Physics

Mathematical Physics

7 pages, 1 figure

Scientific paper

10.1142/S1230161210000151

In this paper we describe bistochastic Kadison-Schawrz operators on
$M_2(\mathbb{C})$. Such a description allows us to find positive, but not
Kadison-Schwarz operators. Moreover, by means of that characterization we
construct Kadison-Schawrz operators, which are not completely positive.

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