Comment on `Single particle nonlocality with completely independent reference states'

TL;DR

This paper critiques a previous claim of local realism violation using single-photon correlations, identifying a calculational error that invalidates the original conclusions.

Contribution

It provides a critical analysis of prior work, correcting a key mistake and clarifying the validity of claims regarding nonlocality with single photons.

Findings

The original claim of local realism violation is invalidated.

A calculational mistake was identified in the prior work.

The corrected analysis shows no violation of local realism.

Abstract

We comment on the purported violation of local realism, by a single photon induced correlations between homodyne detectors, which one can find in: New J. Phys. 10, 113024 (2008), [arXiv:0807.0109]. The claim is erroneous, due to a calculational mistake. As the result is the basis of other claims in the paper, they are unsubstantiated.