9 papers
Polar chiral active matter as a motile, disordered Josephson array: Information supercurrents and Goldstone spin waves
Magnus F Ivarsen
We consider a minimalist model of polar chiral active matter: overdamped, self-propelled agents coupled through a localized Kuramoto--Sakaguchi interaction, which causes alignment.…
Renormalised hydrodynamics in polar chiral active matter: Spectral scaling and disorder-driven vortex clustering in phase-coupled, motile oscillators
Magnus F Ivarsen
Active turbulence in overdamped chiral systems presents a complex challenge, namely the frequent exhibition of non-universal spectral scaling, creating large-scale coherent structu…
Kinetic renormalization of auroral turbulence
Magnus F Ivarsen, Kaili Song, Luca Spogli +19
Driven-dissipative systems often exhibit self-organization in the form of coherent dissipative structures. However, observing such critical states in natural plasmas remains elusiv…
Magnetic reconnection as an Adler-Ohmic bifurcation: The topological origin of Bohm resistivity
Magnus F Ivarsen
The physical origin of 'anomalous' resistivity in magnetic reconnection remains one of the longest-standing problems in space plasma physics. While the empirical Bohm diffusion sca…
Kinetic Turing Instability and Emergent Spectral Scaling in Chiral Active Turbulence
Magnus F Ivarsen
The spontaneous emergence of coherent structures from chaotic backgrounds is a hallmark of active biological swarms. We investigate this self-organization by simulating an ensemble…
A Characteristic Signature of Magnetospheric Wave-Particle Interactions Found in the Turbulent E-region
Magnus F Ivarsen, Yukinaga Miyashita, Jean-Pierre St-Maurice +16
Plasma waves in the magnetosphere scatter electrons, causing them to precipitate into Earth's atmosphere, imparting their temporal characteristics to diffuse auroras. In a case stu…