2018/01/08 by Marcin Markiewicz, Dagomir Kaszlikowski, Markiewicz, Marcin +7
Arts and Humanities · Computer Science · Physics and Astronomy · #FOS: Physical sciences #Philosophy and History of Science #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #quant-ph
paper · pdf · doi:10.48550/arxiv.1801.02338
11 pages, 4 figures
arxiv created 2018/01/08 · openalex publication_date 2018/01/08 · arxiv updated 2018/01/09 · openalex created_date 2022/09/24 · openalex updated_date 2026/07/28
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 different from single-photon detections, which are primitives of any genuine Bell experiment. We show that this fundamental difference between field intensities measurements and single photon detections shifts the classical bound of relevant Bell inequalities to its algebraic limit, leaving no place for their violations.