1998/11/26 by Markus Simonius
Physics and Astronomy · #quant-ph
published as Helv.Phys.Acta 66 (1993) 721 · 16 pages A4, LaTeX, no figures
arxiv created 1998/11/26 · arxiv updated 2009/12/01
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.