= Nicholas Harrigan
{c}
{tag=Physicist}
A theoretical <physicist> who coauthored a classification of interpretations through their underlying-state distributions. With <Robert Spekkens>, he distinguished <psi-epistemic models>, which permit overlap between distributions for distinct pure <quantum states>, from <psi-ontic models>, which forbid it. The framework makes arguments about what a <wave function> represents mathematically explicit, and helps state the assumptions behind later impossibility theorems.<Einstein, incompleteness, and the epistemic view of quantum states by Nicholas Harrigan and Robert W. Spekkens>[Abstract and classification of hidden-variable models]{ref}
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