]>Dissipation Effects in the Ratchetlike Fermi Acceleration : Figure 4
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(a)
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(b)
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(c)
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(d)
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(e)
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(f)
Figure 4: Evolution of 5 0 0 chaotic orbits on the phase space 𝑉 × 𝜙 for the parameters 𝜇 = 1 0 , 𝑣 0 = 0 . 2 for case 𝐃 ( Δ 𝜂 = − 0 . 0 1 , 𝜂 1 = 1 . 0 1 , 𝜂 2 = 1 . 0 0 ) . For (a) 𝛾 = 0 . 0 and (b) 𝛾 = 1 0 − 6 . The mean values of the velocity, calculated over 3 0 0 0 trajectories, are shown in (c)–(f) and are related to the cases 𝛾 = 0 . 0 , 1 0 − 6 , 1 0 − 5 , 1 0 − 4 , 1 0 − 3 , 1 0 − 2 , 1 0 − 1 .