A General Argument Against the Universal Validity of the Superposition Principle

Details A General Argument Against the Universal Validity of the Superposition Principle A General Argument Against the Universal Validity of the Superposition Principle

2000-09-05

arxiv.org/abs/quant-ph/0009020v1

Phys.Lett. A275 (2000) 373

Physics

Quantum Physics

17 pages, Latex, to appear in Phys. Lett. A

Scientific paper

10.1016/S0375-9601(00)00612-5

We reconsider a well known problem of quantum theory, i.e. the so called measurement (or macro-objectification) problem, and we rederive the fact that it gives rise to serious problems of interpretation. The novelty of our approach derives from the fact that the relevant conclusion is obtained in a completely general way, in particular, without resorting to any of the assumptions of ideality which are usually done for the measurement process. The generality and unescapability of our assumptions (we take into account possible malfunctionings of the apparatus, its unavoidable entanglement with the environmment, its high but not absolute reliability, its fundamentally uncontrollable features) allow to draw the conclusion that the very possibility of performing measurements on a microsystem combined with the assumed general validity of the linear nature of quantum evolution leads to a fundamental contradiction.

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