Einstein, Incompleteness, and the Epistemic View of Quantum States

@article{Harrigan2007EinsteinIA,
  title={Einstein, Incompleteness, and the Epistemic View of Quantum States},
  author={Nicholas M Harrigan and Robert W. Spekkens},
  journal={Foundations of Physics},
  year={2007},
  volume={40},
  pages={125-157}
}
Does the quantum state represent reality or our knowledge of reality? In making this distinction precise, we are led to a novel classification of hidden variable models of quantum theory. We show that representatives of each class can be found among existing constructions for two-dimensional Hilbert spaces. Our approach also provides a fruitful new perspective on arguments for the nonlocality and incompleteness of quantum theory. Specifically, we show that for models wherein the quantum state… 
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