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- W2900883863 abstract "In the present paper we show a link between bistochastic quantum channels and classical maps. The primary goal of this work is to analyse the multiplicative structure of the Birkhoff polytope of order 3 (the simplest non-trivial case). A suitable complex parametrization of the Birkhoff polytope is proposed, which reveals several its symmetries and characteristics, in particular: (i) the structure of Markov semigroups inside the Birkhoff polytope, (ii) the relation between the set of Markov time evolutions, the set of positive definite matrices and the set of divisible matrices. A condition for Markov time evolution of semigroups in the set of symmetric bistochastic matrices is then derived, which leads to an universal conserved quantity for all Markov evolutions. Finally, the complex parametrization is extended to the Birkhoff polytope of order 4." @default.
- W2900883863 created "2018-11-29" @default.
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- W2900883863 date "2018-11-23" @default.
- W2900883863 modified "2023-09-27" @default.
- W2900883863 title "Dynamical semigroups in the Birkhoff polytope of order 3 as a tool for analysis of quantum channels." @default.
- W2900883863 hasPublicationYear "2018" @default.
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