Quantum-Limited Measurement and Information in Mesoscopic Detectors

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dc.creatorClerk, A. A.
dc.creatorGirvin, S. M.
dc.creatorStone, A. D.
dc.date2002-10-31
dc.date.accessioned2026-07-07T02:48:01Z
dc.date.available2026-07-07T02:48:01Z
dc.descriptionWe formulate general conditions necessary for a linear-response detector to reach the quantum limit of measurement efficiency, where the measurement-induced dephasing rate takes on its minimum possible value. These conditions are applicable to both non-interacting and interacting systems. We assess the status of these requirements in an arbitrary non-interacting scattering based detector, identifying the symmetries of the scattering matrix needed to reach the quantum limit. We show that these conditions are necessary to prevent the existence of information in the detector which is not extracted in the measurement process.
dc.description13 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/cond-mat/0211001
dc.identifierhttp://arxiv.org/abs/cond-mat/0211001
dc.identifierPhys. Rev. B 67, 165324 (2003)
dc.identifierdoi:10.1103/PhysRevB.67.165324
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/20235
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleQuantum-Limited Measurement and Information in Mesoscopic Detectors
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