Qubit feedback and control with kicked quantum nondemolition measurements: A quantum Bayesian analysis

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dc.creatorJordan, Andrew N.
dc.creatorKorotkov, Alexander N.
dc.date2006-06-27
dc.date.accessioned2026-07-07T07:12:52Z
dc.date.available2026-07-07T07:12:52Z
dc.descriptionThe informational approach to continuous quantum measurement is derived from POVM formalism for a mesoscopic scattering detector measuring a charge qubit. Quantum Bayesian equations for the qubit density matrix are derived, and cast into the form of a stochastic conformal map. Measurement statistics are derived for kicked quantum nondemolition measurements, combined with conditional unitary operations. These results are applied to derive a feedback protocol to produce an arbitrary pure state after a weak measurement, as well as to investigate how an initially mixed state becomes purified with and without feedback.
dc.description13 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0606676
dc.identifierhttp://arxiv.org/abs/cond-mat/0606676
dc.identifierPhys. Rev. B 74, 085307 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.085307
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112234
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleQubit feedback and control with kicked quantum nondemolition measurements: A quantum Bayesian analysis
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