Chimera States — Phase Oscillator Ring

256 phase oscillators: one half synchronized, the other incoherent — the chimera state

Pop A coherence: -- Pop B coherence: -- Step: 0
About: Chimera states (Kuramoto & Battogtokh 2002; named by Abrams & Strogatz 2004) are spontaneous symmetry-breaking states where identical oscillators split into synchronized and incoherent groups. The ring is split into two populations A (0–127) and B (128–255). With nonlocal coupling and phase lag α ≈ 1.46, one half phase-locks while the other drifts randomly — a chimera. The top panel shows phases θᵢ on a circle; bottom shows local order parameter.