Effect of a coordinate measurement on the statistical ensemble of a quantum mechanical system

by A. E. Glassgold, D. Holliday

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A method is developed for discussing the measurement of quantum mechanical observables with continuous eigenvalue spectra. In this method, the Wigner distribution function has a role similar to that of the Gibbs phase space density in the corresponding classical problem. The analysis applies to a wide class of physical situations, such as a field or a material particle.

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