On Concurrence and Entanglement of Rank Two Channels

Details On Concurrence and Entanglement of Rank Two Channels On Concurrence and Entanglement of Rank Two Channels

2006-05-11

arxiv.org/abs/quant-ph/0605103v1

Open Sys. & Information Dynamics 12 (2005) 1 - 14

Physics

Quantum Physics

20 pages. An appendix is added. An error in (45) - (47) and known (to me) misspellings are corrected

Scientific paper

Concurrence and further entanglement quantifyers 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.

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