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A boost for quantum reality: Theorists claim they can prove that wavefunctions are real states

from Nature News

The online discussion of a paper claiming to show mathematically that the wavefunction is real has ranged from ardently star-struck to downright vitriolic since the article was first released as a preprint in November 2011. The paper, thought by some to be one of the most important in quantum foundations in decades, was recently published in Nature Physics. Philosophically the wavefunction either represents a real state that is a probabilistic distribution of possible states, or it is representation of a state that cannot actually be known. This new result shows that theories that treat the wavefunction in terms of lack of knowledge of a system's physical state will fail to reproduce foundational predictions in quantum mechanics, and that that the same reality cannot underpin different quantum states. more

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