Quantum information becomes classical when distributed to many users

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dc.creatorChiribella, G.
dc.creatorD'Ariano, G. M.
dc.date2006-08-01
dc.date2007-01-31
dc.date.accessioned2026-07-07T07:43:55Z
dc.date.available2026-07-07T07:43:55Z
dc.descriptionAny physical transformation that equally distributes quantum information over a large number M of users can be approximated by a classical broadcasting of measurement outcomes. The accuracy of the approximation is at least of the order 1/M. In particular, quantum cloning of pure and mixed states can be approximated via quantum state estimation. As an example, for optimal qubit cloning with 10 output copies, a single user has error probability p > 0.45 in distinguishing classical from quantum output--a value close to the error probability of the random guess.
dc.description4 pages, no figures, published version
dc.identifierhttps://arxiv.org/abs/quant-ph/0608007
dc.identifierhttp://arxiv.org/abs/quant-ph/0608007
dc.identifierPhys. Rev. Lett. 97, 250503 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.250503
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/123010
dc.subjectQuantum Physics
dc.titleQuantum information becomes classical when distributed to many users
dc.typetext

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