3.6 Fluctuating Force, or “Rocking” Ratchet
39
Fig. 3.15 Flashing ratchet with τ = 0.4: v vs V 0 , with F = 0 and D fixed. We observe
the curve has a minimum, product of a competition between the barrier height, V 0 , and thermal
fluctuations, D, with the influence of the dichotomous noise. This computation was performed
with Program 3.4. with the potential tilted to the right
Fig. 3.16 The tilting ratchet: the activation energy toward the right when the ratchet is tilted to the
right is lower than the activation energy toward the left when the ratchet is tilted to the left
39
Fig. 3.15 Flashing ratchet with τ = 0.4: v vs V 0 , with F = 0 and D fixed. We observe
the curve has a minimum, product of a competition between the barrier height, V 0 , and thermal
fluctuations, D, with the influence of the dichotomous noise. This computation was performed
with Program 3.4. with the potential tilted to the right
Fig. 3.16 The tilting ratchet: the activation energy toward the right when the ratchet is tilted to the
right is lower than the activation energy toward the left when the ratchet is tilted to the left