= Pusey-Barrett-Rudolph theorem
{c}
{title2=PBR}
= PBR theorem
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{synonym}
Under <preparation independence>, an <ontological model of a quantum system> reproducing exact quantum <quantum measurement> probabilities cannot assign overlapping preparation measures to distinct <pure states>. An exclusion <quantum measurement> on independent copies makes every outcome impossible for one possible preparation; a common ontic region would require every response to vanish there. Thus the conclusion is a <psi-ontic model>, not a blanket exclusion of hidden variables or all informational interpretations.
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