Work

Two-dimensional Coulomb gas in a nonconservative trap

Year: 2025

Type: article

Abstract: We study the nonequilibrium steady state of a two-dimensional Coulomb gas under the action of an anisotropic harmonic trapping potential along with a nonconservative rotational force. In the case without rotation, the equilibrium (zero temperature) steady state has a uniform density supported over a static elliptical droplet. The addition of a rotational force drives the system into a nonequilibrium steady state where the density is still uniform inside an ellipse, but the ellipse gets tilted by a fixed angle compared to the nonrotational case. In addition, a nonzero current is generated inside the droplet which runs concentrically to the droplet boundary. For large rotational force, the droplet develops a purely circular form. Our results are predicted by a simple hydrodynamic calculation, confirmed by numerical simulations, and provide a full understanding of a driven nonequilibrium state in a strongly interacting system.

Source: Physical review. E

DOI: 10.1103/gy9c-gsrd

Authors: David S. Dean, Rashed Aljasmi, Satya N. Majumdar

Institutions: Université de Bordeaux, New York University Abu Dhabi, Laboratoire de Physique Théorique et Modèles Statistiques

Language: English

Topic: Dust and Plasma Wave Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

Award: Extreme dynamics in interacting particle systems