Comment on "State-Independent Experimental Test of Quantum Contextuality in an Indivisible System"

TL;DR

This paper critiques a recent experiment claiming to test quantum contextuality, arguing that the measurement and preparation methods depend on the context, thus invalidating the conclusions about contextuality.

Contribution

It provides a critical analysis showing that the experimental setup cannot definitively test quantum contextuality due to context-dependent measurement and preparation.

Findings

The experiment's measurement depends on the context.

State preparation is context-dependent.

The conclusions about contextuality are not justified.

Abstract

We argue that the experiment described in the recent Letter by Zu et al. [Phys. Rev. Lett. 109, 150401 (2012); arXiv:1207.0059v1] does not allow to make conclusions about contextuality, since the measurement of the observables as well as the preparation of the state manifestly depend on the chosen context.