Figure 1.

(a) Thirty illustrative trajectories of the heavy particle computed by the MD algorithm [A1]–[A6]. (b) The mean squared displacement computed by 10³ realizations of the algorithm [A1]–[A6] (solid line). The MD results are compared with BD results: equation (2.13) (dashed line), $\sqrt{2Dt}$ (dot-dashed line) and equation (2.14) (dotted line). We use μ=10³, γ=10, D=1, Δt=10⁻⁷, L=20, X(0)=0 and V (0)=0. (Online version in colour.)