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 Tapia, O. and Fidder, H. TOWARDS A QUANTUM MOLECULAR MEASUREMENT THEORY: STERN-GERLACH THOUGHT EXPERIMENTS AT THE INTERFACE OF HILBERT AND REAL SPACESA model is presented to describe measurements in quantum mechanics that are energy conserving and based on a consistent use of the linear superposition principle. Measurements contain two aspects: recording and reading. Recording elicits full coherent interaction of the object quantum system with the quantum measuring apparatus (QMA). Stern-Gerlach experiments are analyzed and used to introduce practical aspects of the recording/reading processes. Reading subsequent to a recording is performed with special QMA endowed with local properties that are included in the present scheme as special boundary conditions. Two classes of local reading are defined: reading-in-amplitude (RIA) and reading-in-intensity (RII). The latter corresponds to populations or local counts. The former preserves quantum mechanical nature and serves to prepare quantum states from local sources. The existing mathematical structure of quantum mechanics is used without introducing the standard measurement and probabilistic postulates. A local RII, expressed as a final (irreversible) counting process, yields results in agreement with the standard statistical interpretation of quantum mechanics. J. Chil. Chem. Soc., June 2004, vol.49, no.2, p.113-120. ISSN 0717-9707
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