Universal and phase covariant superbroadcasting for mixed qubit states

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dc.creatorBuscemi, Francesco
dc.creatorD'Ariano, Giacomo Mauro
dc.creatorMacchiavello, Chiara
dc.creatorPerinotti, Paolo
dc.date2006-02-15
dc.date.accessioned2026-07-07T07:04:19Z
dc.date.available2026-07-07T07:04:19Z
dc.descriptionWe describe a general framework to study covariant symmetric broadcasting maps for mixed qubit states. We explicitly derive the optimal N to M superbroadcasting maps, achieving optimal purification of the single-site output copy, in both the universal and the phase covariant cases. We also study the bipartite entanglement properties of the superbroadcast states.
dc.description19 pages, 8 figures, strictly related to quant-ph/0506251 and quant-ph/0510155
dc.identifierhttps://arxiv.org/abs/quant-ph/0602125
dc.identifierhttp://arxiv.org/abs/quant-ph/0602125
dc.identifierPhys. Rev. A 74, 042309 (2006)
dc.identifierdoi:10.1103/PhysRevA.74.042309
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/109318
dc.subjectQuantum Physics
dc.titleUniversal and phase covariant superbroadcasting for mixed qubit states
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