Quantum non ideal measurements
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We analyse non ideal quantum measurements described as scattering processes providing an estimator of the measured quantity. The sensitivity is expressed as an equivalent input noise. We address the Von Neumann problem of chained measurements and show the crucial role of preamplification.
7 pages, 6 figures, RevTeX, Divers aspects de la mecanique quantique (Paris, june 1999)
7 pages, 6 figures, RevTeX, Divers aspects de la mecanique quantique (Paris, june 1999)