Fig. 3: Distinct time crystals.
From: Bifurcation of time crystals in driven and dissipative Rydberg atomic gas
a Measured Fourier spectrum versus the coupling detuning Δc. Labels A–E in a indicate the areas that characterize the distinct time crystal phases. The measured responses of several non-integer multiples of f = f0 represent the 'high-order' continuous time crystals relative to the f = f0 time crystal, which are the results of period doubling of f0 peak. The color bar from 0 to 1 represents the Fourier transform intensity. b–e is the corresponding Fourier spectrum at the detuning Δc/2π = −17.4 MHz (b), Δc/2π = −8.9 MHz (c), Δc/2π = −1.3 MHz (d), and Δc/2π = 9.8 MHz (e), respectively. The peaks in Fourier spectra b–d show evidence of distinct periodicity, and e is the measured Fourier spectrum of the chaotic phase. The sideband peaks that appeared close to f0 are from the other small weighted oscillation modes.
