Unambiguous comparison of ensembles of quantum states

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dc.creatorSedlak, Michal
dc.creatorZiman, Mario
dc.creatorBuzek, Vladimir
dc.creatorHillery, Mark
dc.date2007-12-11
dc.date.accessioned2026-07-07T12:11:31Z
dc.date.available2026-07-07T12:11:31Z
dc.descriptionWe present a solution of the problem of the optimal unambiguous comparison of two ensembles of unknown quantum states (psi_1)^k and (psi_2)^l. We consider two cases: 1) The two unknown states psi_1 and psi_2 are arbitrary states of qudits. 2) Alternatively, they are coherent states of a harmonic oscillator. For the case of coherent states we propose a simple experimental realization of the optimal "comparison" machine composed of a finite number of beam-splitters and a single photodetector.
dc.description7 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0712.1616
dc.identifierhttp://arxiv.org/abs/0712.1616
dc.identifierPhys. Rev. A 77, 042304 (2008)
dc.identifierdoi:10.1103/PhysRevA.77.042304
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210241
dc.subjectQuantum Physics
dc.titleUnambiguous comparison of ensembles of quantum states
dc.typetext

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