PerspectivePhysics

Classical entanglement?

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Science  04 Dec 2015:
Vol. 350, Issue 6265, pp. 1172-1173
DOI: 10.1126/science.aad7174

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Summary

Since the inception of quantum theory, scientists and philosophers have been puzzled by the apparent indeterminacy of physical properties prior to the measurement process. These problems suggest that quantum mechanics might ultimately be incompatible with basic notions of “realism”—that is, the view that a physical system possesses inherent properties that are independent of procedures used to measure them. This issue lies at the core of the famous gedanken experiment of Einstein, Podolsky, and Rosen (EPR) (1) and of attempts to develop a conceptual understanding (24) of EPR correlations.