Measurement in Quantum Mechanics: From Probabilities to Objective Events

Details Measurement in Quantum Mechanics: From Probabilities to Objective Events Measurement in Quantum Mechanics: From Probabilities to Objective Events

1998-11-26

arxiv.org/abs/quant-ph/9811074v1

Helv.Phys.Acta 66 (1993) 721

Physics

Quantum Physics

16 pages A4, LaTeX, no figures

Scientific paper

The problem of measurement in quantum mechanics is reanalyzed within a general, strictly probabilistic framework (without reduction postulate). Based on a novel comprehensive definition of measurement the natural emergence of objective events is demonstrated and their formal representation within quantum mechanics is obtained. In order to be objective an event is required to be observable or readable in at least two independent, mutually non-interfering ways with necessarily agreeing results. Consistency in spite of unrestricted validity of reversibility of the evolution or the superposition principle is demonstrated and the role played by state reduction, in a properly defined restricted sense, is discussed. Some general consequences are pointed out.

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