On Concurrence and Entanglement of Rank Two Channels
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Concurrence and further entanglement quanti.ers can be computed explicitly for channels of rank two if representable by just two Kraus operators. Almost all details are available for the subclass of rank two 1-qubit channels. There is a simple geometric picture beyond, explaining nicely the role of anti-linearity.
KeywordsStatistical Physic Mechanical Engineer System Theory Kraus Operator Geometric Picture
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