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Continuous measurements in quantum systems

Carlo Presilla, Ubaldo Tanbini

cond-matarXiv:cond-mat/9711007

Abstract

During a continuous measurement, quantum systems can be described by a stochastic Schrödinger equation which, in the appropriate limit, reproduces the von Neumann wave-function collapse. The average behavior on the ensemble of all measurement results is described by a master equation obtained from a general model of measurement apparatus consisting of an infinite set of degrees of freedom linearly interacting with the measured system and in contact with a reservoir at high temperature.

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