Fig. 2: Representative dynamical behaviors.
From: Observation of continuous time crystals and quasi-crystals in spin gases
a–c Phase portraits of the average spin polarization {Px, Py, Pz} and corresponding Poincaré sections (accentuated) at Py = 0 from numerical simulation. d–f Fourier spectrum (normalized) obtained through the fast Fourier transform (FFT) of the intensity signal recorded by PD in the stationary window (inset). g–i Relative time phase distribution. Each point represents the Fourier amplitude at the same peak frequency on the complex plane. Each experiment is performed at α ≈ 42.52 rad/s, g ≈ 50 nT/cm for the Limit cycle phase; α ≈ 159.62 rad/s, g ≈ 50 nT/cm for the Quasi-periodic phase; α ≈ 350.86 rad/s, g ≈ 50 nT/cm for the Chaotic phase.
