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- W1674991908 abstract "Quantum channels can be mathematically represented as completely positive trace-preserving maps that act on a density matrix. A general quantum channel can be written as a convex sum of `extremal' channels. We show that for an $N$-level system, the extremal channel can be characterized in terms of $N^2$-$N$ real parameters coupled with rotations. We give a representation for $N$= 2, 3, 4." @default.
- W1674991908 created "2016-06-24" @default.
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- W1674991908 date "2009-09-21" @default.
- W1674991908 modified "2023-09-27" @default.
- W1674991908 title "Extremal Channels for a genaral Quantum system" @default.
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- W1674991908 hasPublicationYear "2009" @default.
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