Comment on "Experimental demonstration of direct path state characterization by strongly measuring weak values in a matter-wave interferometer"

TL;DR

This paper critiques a recent experiment claiming to perform strong measurements of weak values, arguing that it does not truly achieve this despite correctly estimating pre-selected states.

Contribution

It clarifies the distinction between estimating pre-selected states and performing strong measurements of weak values, challenging the interpretation of the previous experiment.

Findings

The experiment does not constitute strong measurements of weak values.

Pre-selected states are correctly estimated, but weak value measurement claims are unsupported.

The paper emphasizes the importance of measurement interpretation in quantum experiments.

Abstract

It is argued that the strong coupling version of recent experiment [Denkmayr et al., PRL 118, 010402 (2017)] while correctly estimating the pre-selected states of the neutrons does not perform strong measurements of weak values as claimed.