A Simple Field Theoretic Description of Single-Photon Nonlocality

TL;DR

This paper provides a straightforward field theoretic proof that a single photon exhibits nonlocality through its electric field, emphasizing the field's role over the particle perspective, without relying on inequalities or specific measurements.

Contribution

It offers a simple, rigorous demonstration of single-photon nonlocality using field theory, avoiding traditional inequality-based tests.

Findings

Electric field of single-photon beam shows nonlocality

Nonlocality demonstrated without inequalities

Results have general validity

Abstract

We present a simple yet rigorous field theoretic demonstration of the nonlocality of a single-photon field. The formalism used allows us to calculate the electric field of a single-photon light beam sent through a beam splitter, which directly demonstrates that it is the light field, rather than the photon itself regarded as a particle, that exhibits nonlocality. Our results are obtained without using either inequalities or specific measurement apparatuses, so that they have perfectly general validity.