# Quantum ferrofluid turbulence

## TL;DR

This paper investigates turbulence in a quantum ferrofluid formed by a dipolar Bose gas, revealing how dipolar interactions influence vortex structures and decay behaviors, and suggesting new ways to control turbulence with magnetic fields.

## Contribution

It introduces a detailed simulation study of turbulence in dipolar Bose gases, highlighting the effects of dipolar interactions on vortex configurations and decay dynamics, which is novel in quantum ferrofluid research.

## Key findings

- Dipolar interactions induce polarized turbulence and density corrugations.
- Vortex lines tend to form in low-density regions to minimize energy.
- Vortex decay follows a $t^{-3/2}$ power law when dipolar interactions dominate.

## Abstract

We study the elementary characteristics of turbulence in a quantum ferrofluid through the context of a dipolar Bose gas condensing from a highly non-equilibrium thermal state. Our simulations reveal that the dipolar interactions drive the emergence of polarized turbulence and density corrugations. The superfluid vortex lines and density fluctuations adopt a columnar or stratified configuration, depending on the sign of the dipolar interactions, with the vortices tending to form in the low density regions to minimize kinetic energy. When the interactions are dominantly dipolar, the decay of vortex line length is enhanced, closely following a $t^{-3/2}$ behaviour. This system poses exciting prospects for realizing stratified quantum turbulence and new levels of generating and controlling turbulence using magnetic fields.