Simulations of multi-field ultralight axion-like dark matter

Understand

As constraints on ultralight axion-like particles (ALPs) tighten, models with multiple species of ultralight ALP are of increasing interest.

• We perform simulations of two-ALP models with particles in the currently supported range [arXiv:1307.1705] of plausible masses.
• The code we modified, UltraDark.jl, not only allows for multiple species of ultralight ALP with different masses, but also different self-interactions and inter-field interactions.
• This allows us to perform the first three-dimensional simulations of two-field ALPs with self-interactions and inter-field interactions.