Optimal cloning of unitary transformations

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dc.creatorChiribella, G.
dc.creatorD'Ariano, G. M.
dc.creatorPerinotti, P.
dc.date2008-04-01
dc.date2009-04-14
dc.date.accessioned2026-07-07T13:02:59Z
dc.date.available2026-07-07T13:02:59Z
dc.descriptionAfter proving a general no-cloning theorem for black boxes, we derive the optimal universal cloning of unitary transformations, from one to two copies. The optimal cloner is realized by quantum channels with memory, and greately outperforms the optimal measure-and-reprepare cloning strategy. Applications are outlined, including two-way quantum cryptographic protocols.
dc.description4 pages, 1 figure, published version
dc.identifierhttps://arxiv.org/abs/0804.0129
dc.identifierhttp://arxiv.org/abs/0804.0129
dc.identifierPhys. Rev. Lett. 101, 180504 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.180504
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226639
dc.subjectQuantum Physics
dc.titleOptimal cloning of unitary transformations
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