= Matthew F. Pusey
{c}
{tag=Physicist}
A theoretical <physicist> who, with <Jonathan Barrett> and <Terry Rudolph>, derived the <Pusey-Barrett-Rudolph theorem>. A joint measurement on independently prepared systems can exclude outcomes that overlapping underlying-state distributions would require to remain possible. This gives a sharp obstruction to a class of <psi-epistemic models>, rather than a conclusion free of assumptions about preparation.<On the reality of the quantum state by Matthew F. Pusey and others>[Equations (1)–(5) and generalization in Appendix A]{ref}
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