= Robert Spekkens
{c}
{tag=Physicist}
{wiki}
= Robert W. Spekkens
{c}
{synonym}
A theoretical <physicist> who, with <Nicholas Harrigan>, made the distinction between <psi-ontic models> and <psi-epistemic models> precise. In an <ontological model of a quantum system>, the key question is whether different pure <quantum states> can assign nonzero probability to the same underlying physical state. This separates overlap of preparation distributions from the different question of whether the <wave function> is a complete description.<Einstein, incompleteness, and the epistemic view of quantum states by Nicholas Harrigan and Robert W. Spekkens>[Classification of ontological models and distinction between epistemicity and incompleteness]{ref}
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