Scattering of second sound waves by quantum vorticity

TL;DR

This paper proposes a novel method to detect and measure quantum vorticity in superfluid helium by analyzing the scattering of second sound waves, with theoretical calculations supporting its feasibility.

Contribution

It introduces a new scattering-based technique for quantum vorticity detection and provides theoretical estimates demonstrating its potential for single vortex detection.

Findings

Theoretical calculation of scattered second sound amplitude from vortices.

Feasibility of experimental verification of the detection method.

Potential to detect a single quantum vortex.

Abstract

A new method of detection and measurement of quantum vorticity by scattering second sound off quantized vortices in superfluid Helium is suggested. Theoretical calculations of the relative amplitude of the scattered second sound waves from a single quantum vortex, a vortex ring, and bulk vorticity are presented. The relevant estimates show that an experimental verification of the method is feasible. Moreover, it can even be used for the detection of a single quantum vortex.