Two-dimensional Coulomb gas in a nonconservative trap.

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.

• Publication year

  2025

• Venue

  Physical Review E

• Publication date

  2025-06-23

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/gy9c-gsrdarXiv 2506.18551PMID 40954748
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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