Comment on "Relativity of Quantum States in Entanglement Swapping: Violation of Bell's Inequality with no Entanglement"

TL;DR

This paper comments on a recent entanglement swapping experiment, highlighting prior work that introduced similar ideas about measurement order and discussing important related points.

Contribution

It clarifies that the concept of switching measurement order in entanglement swapping was previously introduced, providing context and addressing related issues.

Findings

The idea of measurement order switching predates the recent paper.

Previous works laid the groundwork for the recent experiment.

The comment emphasizes the importance of prior research in understanding entanglement phenomena.

Abstract

In a recent interesting article Chris Nagele, Ebubechukwu O. IloOkeke, Peter P. Rohde, Jonathan P. Dowling, and Tim Byrnes discuss an entanglement swapping experiment using a setup where it is possible to switch the time ordering of measurements. I would like to draw your attention to the fact that the very same idea was introduced in two previous papers, and briefly address some important points related to the subject.