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From contextuality of a single photon to realism of an electromagnetic wave
2019
npj Quantum Information
Violations of Bell inequalities have been an incontestable indicator of non-classicality since the seminal paper by John Bell. However, recent claims of Bell inequalities violations with classical light have cast some doubts on their significance as hallmarks of non-classicality. Here, we challenge those claims. The crux of the problem is that such classical experiments simulate quantum probabilities with intensities of classical fields. However, fields intensities measurements are radically
doi:10.1038/s41534-018-0117-8
fatcat:3uig67s5znbg7agqlrqmcg3jbu