17 citations · 48 across the 9 of their papers we have counts for
9 papers
A computational study of nematic core structure and disclination interactions in elastically anisotropic nematics
Lucas Myers, Carter Swift, Jonas Ronning +2
A singular potential method in the Q tensor order parameter representation of a nematic liquid crystal is used to study the equilibrium configuration of a disclination dipole. Unli…
Spontaneous flows and dynamics of full-integer topological defects in polar active matter
Jonas Rønning, Julian Renaud, Amin Doostmohammadi +1
Polar active matter of self-propelled particles sustain spontaneous flows through the full-integer topological defects. We study theoretically the effect of both polar and dipolar…
A unified field theory of topological defects and non-linear local excitations
Vidar Skogvoll, Jonas Rønning, Marco Salvalaglio +1
Topological defects and smooth excitations determine the properties of systems showing collective order. We introduce a generic non-singular field theory that comprehensively descr…
Nucleation and kinematics of vortices in stirred Bose Einstein condensates
Jonas Rønning, Luiza Angheluta
We apply the Halperin-Mazenco formalism within the Gross-Pitaevskii theory to characterise the kinematics and nucleation of quantum vortices in a two-dimensional stirred Bose Einst…
Symmetry-restoring crossover from defect-free to defect-laden turbulence in polar active matter
Benjamin H. Andersen, Julian Renaud, Jonas Rønning +2
Coherent flows of self-propelled particles are characterized by vortices and jets that sustain chaotic flows, referred to as active turbulence. Here, we reveal a crossover between…
Defect self-propulsion in active nematic films with spatially-varying activity
Jonas Rønning, M. Cristina Marchetti, Luiza Angheluta
We study the dynamics of topological defects in active nematic films with spatially-varying activity and consider two setups: i) a constant activity gradient, and ii) a sharp jump…
Trapping of active Brownian and run-and-tumble particles: a first-passage time approach
Emily Qing Zang Moen, Kristian Stølevik Olsen, Jonas Rønning +1
We use a first-passage time approach to study the statistics of the trapping times induced by persistent motion of active particles colliding with flat boundaries. The angular firs…
Flow around topological defects in active nematic films
Jonas Rønning, M. Cristina Marchetti, Mark J. Bowick +1
We study the active flow around isolated defects and the self-propulsion velocity of defects in an active nematic film with both viscous dissipation (with viscosity ) and…
Classical analogies for the force acting on an impurity in a Bose-Einstein condensate
Jonas Rønning, Audun Skaugen, Emilio Hernández-García +2
We study the hydrodynamic forces acting on a small impurity moving in a two-dimensional Bose-Einstein condensate at non-zero temperature. The condensate is modelled by the damped-G…