Bubble Growth in Superfluid 3-He: The Dynamics of the Curved A-B Interface

TL;DR

This paper investigates the hydrodynamics of curved A-B interfaces in superfluid helium-3, revealing how interface tension influences transition velocity, sound amplitudes, and magnetic signals, including bubble interactions.

Contribution

It provides a detailed analysis of curved interface dynamics, including effects of interface tension and magnetic signals, advancing understanding of superfluid helium-3 phase transitions.

Findings

Interface tension increases transition velocity.

Second sound amplitudes are enhanced by curvature.

Magnetic signals from bubble growth are characterized.

Abstract

We study the hydrodynamics of the A-B interface with finite curvature. The interface tension is shown to enhance both the transition velocity and the amplitudes of second sound. In addition, the magnetic signals emitted by the growing bubble are calculated, and the interaction between many growing bubbles is considered.