Researchers Philippe Brax and Patrick Valageas from the Institut de Physique Théorique in France have investigated the dynamical properties of ultra-light dark matter, focusing on the formation and evolution mechanisms of special vortex structures in rotating dark matter halos. The study centers on a novel dark matter model with repulsive self-interaction, whose dynamics are governed by the Gross-Pitaevskii equation describing Bose-Einstein condensates.

Through a combination of analytical derivations and numerical simulations, the team confirmed that stable vortex structures with quantized angular momentum can form inside rotating ultra-light dark matter halos. These vortices organize into an ordered network in the dark matter core, resulting in a flattened “soliton” core in hydrostatic equilibrium. The related paper has been published in Physical Review D. The researchers note that, if this dark matter model holds true, such vortex structures would offer new avenues for detecting ultra-light dark matter, for example through specific gravitational signals they imprint on galaxies.

This work opens a new perspective for exploring the intrinsic properties of dark matter models. By linking laboratory superfluid physics with cosmological-scale phenomena, vortex structures at astrophysical scales could become key observational evidence for validating the existence of ultra-light dark matter, advancing our deeper understanding of cosmic structure formation mechanisms.