Quantum universal detectors

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dc.creatorD'Ariano, G. M.
dc.creatorPerinotti, P.
dc.creatorSacchi, M. F.
dc.date2003-06-04
dc.date.accessioned2026-07-07T07:52:54Z
dc.date.available2026-07-07T07:52:54Z
dc.descriptionWe address the problem of estimating the expectation value <O> of an arbitrary operator O via a universal measuring apparatus that is independent of O, and for which the expectation values for different operators are obtained by changing only the data-processing. The ``universal detector'' performs a joint measurement on the system and on a suitably prepared ancilla. We characterize such universal detectors, and show how they can be obtained either via Bell measurements or via local measurements and classical communication between system and ancilla.
dc.description4 pages, no figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0306025
dc.identifierhttp://arxiv.org/abs/quant-ph/0306025
dc.identifierEurophys. Lett. 65, 165 (2004)
dc.identifierdoi:10.1209/epl/i2003-10079-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/126055
dc.subjectQuantum Physics
dc.titleQuantum universal detectors
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