Josephson and Spin Currents in Coupled Polariton Condensates

A. Kudlis; I. Yu. Chestnov; A. N. Osipov; A. V. Yulin; I. A. Shelykh

Josephson and Spin Currents in Coupled Polariton Condensates

Mesoscale and Nanoscale Physics 2026-07-02 v1

Authors: A. Kudlis , I. Yu. Chestnov , A. N. Osipov , A. V. Yulin , I. A. Shelykh

Abstract

We analyze particle and spin currents in networks of coupled spinor exciton-polariton condensates arranged as plaquettes and regular polygonal rings. In closed geometries, spin-conserving and TE-TM-induced spin-flip tunnelling combine to generate circulating particle currents, hidden spin counterflows, and bond-dependent spin-current patterns. For the minimal geometries - an equilateral triangle, and a square plaquette - we derive analytical expressions for edge-resolved currents from stationary configurations obtained by energy minimization. We then show how particle, in-plane spin, and out-of-plane spin currents partition the parameter plane and provide direct signatures of the equilibrium phases. Finally, we apply the same current-resolved diagnostics to larger rings, where winding numbers and a branch-invariant common-phase coherence metric organize the resulting phase structure.

Keywords

exciton-polariton condensates spin currents Josephson currents plaquettes spinor condensates TE-TM splitting

Cite

@article{arxiv.2607.02265,
  title  = {Josephson and Spin Currents in Coupled Polariton Condensates},
  author = {A. Kudlis and I. Yu. Chestnov and A. N. Osipov and A. V. Yulin and I. A. Shelykh},
  journal= {arXiv preprint arXiv:2607.02265},
  year   = {2026}
}