Concurrence of Stochastic 1-Qubit Maps

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dc.creatorHellmund, Meik
dc.creatorUhlmann, Armin
dc.date2008-02-14
dc.date2008-12-04
dc.date.accessioned2026-07-07T12:08:57Z
dc.date.available2026-07-07T12:08:57Z
dc.descriptionExplicit expressions for the concurrence of all positive and trace-preserving ("stochastic") 1-qubit maps are presented. By a new method we find the relevant convex roof pattern. We conclude that two component optimal decompositions always exist. Our results can be transferred to $2 \times n$-quantum systems providing the concurrence for all rank two density operators as well as a lower bound for their entanglement of formation.
dc.descriptionlonger intro, small changes in text
dc.identifierhttps://arxiv.org/abs/0802.2092
dc.identifierhttp://arxiv.org/abs/0802.2092
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209469
dc.subjectQuantum Physics
dc.titleConcurrence of Stochastic 1-Qubit Maps
dc.typetext

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