Fig. 3.

Power spectra S₁(ω) and real part of the autocorrelation function C₁(t) of $Q_1^{*}$ (x(t)) for the different models with parameters in A and B as in Figs. 1 and 2, respectively. (A) For parameters from Fig. 1 (chosen such that λ₁ = μ₁ + iω₁ is approximately the same for all models with μ₁ = −0.048, ω₁ = 0.698, leading to a more coherent oscillation with a quality factor of |ω₁/μ₁|=14.3), we compare Eq. 15 (solid line) to stochastic simulations of the three models (symbols). (B) For parameters from Fig. 2 (chosen such that λ₁ = μ₁ + iω₁ is approximately the same for all models with μ₁ = −0.168, ω₁ = 0.241, leading to a less coherent oscillation with a quality factor of |ω₁/μ₁|=1.43), we compare Eq. 15 (solid line) to stochastic simulations of the three models (symbols).