Can Drag Force Suppress Fermi Acceleration in a Bouncer Model?

Figure 1

(a) represents a chaotic attractor for the dissipative bouncer model. The control parameters used were 𝛿=60 and 𝑎=10. (b) corresponds to the convergence of the positive Lyapunov exponent for five different initial conditions for the same control parameters used in (a).

(a)

(b)