Comment on "Observations of 2D Polarons and Magneto-Polarons on Superfluid Helium Films"

TL;DR

This paper critically examines a recent experiment claiming to observe 2D polarons on helium films, arguing that the experimental conditions do not support the existence of bound polarons as previously claimed.

Contribution

It provides a theoretical critique showing that the experimental claims are inconsistent with the physical conditions necessary for polaron binding.

Findings

The experimental conditions do not support polaron binding.

A proper evaluation of the holding field alters the interpretation.

The claimed polarons are not bound under the experimental parameters.

Abstract

A recent experimental Physical Review Letter which claims to prove the existence of the single-electron ripplonic polaron associated with electrons on a helium film is examined. A correct evaluation of the holding field and a restriction of the polaron radius to the Wigner-Seitz radius lead to a gross discrepancy between experiment and theory. The polaron is not bound under the experimental conditions.