Magnetic domain growth in a ferromagnetic Bose-Einstein condensate: Effects of current

TL;DR

This paper investigates how superfluid flow influences magnetic domain growth in ferromagnetic Bose-Einstein condensates, revealing that flow significantly alters growth dynamics depending on the quadratic Zeeman effect.

Contribution

It demonstrates the impact of superfluid flow on domain growth laws in ferromagnetic BECs, highlighting differences from classical systems and scalar fields.

Findings

Domain growth follows classical binary fluid laws with flow.

Without flow, growth resembles scalar conserved fields.

Flow effects depend on quadratic Zeeman energy.

Abstract

Magnetic domain patterns in a ferromagnetic Bose-Einstein condensate (BEC) show different properties depending on the quadratic Zeeman effect and dissipation. Another important factor that affects domain patterns and domain growth is superfluid flow of atoms. Domain growth in a ferromagnetic BEC with negative quadratic Zeeman energy is characterized by the same growth law as (classical) binary fluid in the inertial hydrodynamic regime. In the absence of the superfluid flow, the domain growth law for negative quadratic Zeeman energy is the same as that of scalar conserved fields such as binary alloys.