Abstract
It is argued that a quantum mechanical analysis of the measurement process permits one to adjudicate between an individual system interpretation of the state vector and an ensemble interpretation, in favor of the latter. Possible changes to quantum mechanics that would be necessary to enable it to describe individual systems are discussed.
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Ballentine, L.E. What do we learn about quantum mechanics from the theory of measurement?. Int J Theor Phys 27, 211–218 (1988). https://doi.org/10.1007/BF00670749
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DOI: https://doi.org/10.1007/BF00670749