Music of the spheres: sound emitted by the bubbles in liquid helium

TL;DR

This paper explores how dissipation of optical quantum energy in liquid helium produces acoustic waves, discussing detection methods and astrophysical analogues at low temperatures.

Contribution

It introduces the concept of acoustic emission from quantum dissipation in liquid helium and discusses potential detection techniques and astrophysical parallels.

Findings

Optical quantum dissipation in helium generates detectable acoustic waves.

Detection methods for acoustic signals in helium are analyzed.

Low-temperature astrophysical phenomena are analogized with quantum dissipation processes.

Abstract

A large linewidth of electronic transition of an electron trapped in a bubble ("bubblonium") possesses natural, or radiative, and inhomogeneous components. The latter mechanism of the line broadening requires dissipation. Dissipation of optical-frequency quantum into a liquid helium leads to an emission of an acoustic wave. The possibilities of detection of this acoustic signal are discussed in this paper. Finally, the low temperature analogues with several hard-to-observe astrophysical phenomena are discussed.