Bell correlations from local unentangled states of light and quantum electrodynamics

TL;DR

This paper proposes a local realistic model based on quantum electrodynamics that explains Bell correlations without requiring entangled states, emphasizing boundary conditions and wave interference effects.

Contribution

It introduces a novel local model for Bell correlations using boundary conditions and wave interference, challenging the necessity of entanglement in such phenomena.

Findings

Bell correlations can be derived from disentangled waves and boundary conditions.

Wave interference between photon excited and empty waves explains correlations.

The model employs local random variables without assuming underlying causality.

Abstract

Based on the Bell theorem, it has been believed that a theoretical computation of the Bell correlation requires explicit use of an entangled state. Such a physical superposition of light waves occurs in the downconverter sources used in Bell experiments. However, this physical superposition is eliminated by wave propagation to spatially separated detectors. Bell correlations must therefore result from local waves, and the source boundary conditions of their previously entangled state. In the present model, Bell correlations are computed from disentangled separated waves, boundary conditions of nonlinear optics, and properties of single photon and vacuum states specified by quantum electrodynamics. Transient interference is assumed between photon excited waves and photon empty waves based on the possibility of such interference found to be necessary by the designers of Bell experiment sources. The present model employs local random variables without specifying underlying causality