12 citations · 29 across the 10 of their papers we have counts for
10 papers
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…
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 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…
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…
Meter-scale Observations of Equatorial Plasma Turbulence
Magnus F Ivarsen, Lasse B N Clausen, Yaqi Jin +1
The multi-Needle Langmuir Probe collects an electron current through four fixed-bias cylindrical copper needles. This allows for an extremely high sampling frequency, with plasma p…
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…
Eastward Transients in the Dayside Ionosphere II: A Parallel-plate Capacitor-Like Effect
Magnus F Ivarsen, Jean-Pierre St-Maurice, Glenn C Hussey +5
During the 23 April 2023 geospace storm, we observed chorus wave-driven, energetic particle precipitation on closed magnetic field lines in the dayside magnetosphere. Simultaneousl…
A Point-cloud Clustering & Tracking Algorithm for Radar Interferometry
Magnus F Ivarsen, Jean-Pierre St-Maurice, Glenn C Hussey +2
In data mining, density-based clustering, which entails classifying datapoints according to their distributions in some space, is an essential method to extract information from la…
Distinguishing screening mechanisms with environment-dependent velocity statistics
Magnus Fagernes Ivarsen, Philip Bull, Claudio Llinares +1
Alternative theories of gravity typically invoke an environment-dependent screening mechanism to allow phenomenologically interesting deviations from general relativity (GR) to man…