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arXiv:quant-ph/0605103 · Open Systems & Information Dynamics

On Concurrence and Entanglement of Rank Two Channels

Armin Uhlmann

Published Mar 1, 2005• 5 citations
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Abstract

Concurrence and further entanglement quantifiers 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.
DOI
10.1007/s11080-005-0490-6

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