Concurrence and foliations induced by some 1-qubit channels

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dc.creatorUhlmann, Armin
dc.date2003-01-17
dc.date.accessioned2026-07-07T06:27:53Z
dc.date.available2026-07-07T06:27:53Z
dc.descriptionWe start with a short introduction to the roof concept. An elementary discussion of phase-damping channels shows the role of anti-linear operators in representing their concurrence. A general expression for some concurrences is derived. We apply it to 1-qubit channels of length two, getting induced foliations of the state space, the optimal decompositions, and the entropy of a state with respect to these channels. For amplitude-damping channels one obtains an expression for the Holevo capacity allowing for easy numerical calculations.
dc.descriptionQuantum Composite systems 2002, Ustron, Poland, September 2002, talk
dc.identifierhttps://arxiv.org/abs/quant-ph/0301088
dc.identifierhttp://arxiv.org/abs/quant-ph/0301088
dc.identifierInt. J. Theeor. Phys. 42, 983-999 (2003)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97547
dc.subjectQuantum Physics
dc.titleConcurrence and foliations induced by some 1-qubit channels
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