Comment on "Significant-Loophole-Free Test of Bell's Theorem with Entangled Photons"

Abstract

In a recent article Giustina et al. [Phys. Rev. Lett. 115, 250401 (2015)] report on an advanced Bell experiment, simultaneously closing loopholes for local hidden-variable theories. The authors claim that 'local realism' has been refuted, unless 'truly exotic hypotheses' are made. Here I argue that a particularly wide and natural class of local hidden-variable theories survives, for instance when the hidden variables describe a background field. Such background-based theories exploit the freedom-of-choice loophole, which cannot be closed for this type of hidden variables. The dynamics of such models can be illustrated by existing systems, e.g. from fluid mechanics.

References in corpus (3)

• Significant-loophole-free test of Bell's theorem with entangled photons
• Local deterministic model of singlet state correlations based on relaxing measurement independence
• Relaxed Bell inequalities and Kochen-Specker theorems