Open Systems & Information Dynamics

, Volume 12, Issue 1, pp 93–106 | Cite as

On Concurrence and Entanglement of Rank Two Channels

  • Armin Uhlmann


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.


Statistical Physic Mechanical Engineer System Theory Kraus Operator Geometric Picture 
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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Institute for Theoretical PhysicsUniversity of LeipzigGermany

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