Abstract
The usual distinction in quantum mechanics between pure states and mixtures is shown not to be independent of the interpretation adopted. Thus, in a causal theory, certain states should be regarded as sharing the nature of both pure states and mixtures and, as a result, important questions in the theory of measurement must be considered in a different light.
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Andrade e Silva, J. Pure states, mixtures, and reduction of the wave packet. Found Phys 2, 245–256 (1972). https://doi.org/10.1007/BF00708410
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DOI: https://doi.org/10.1007/BF00708410