This force is oscillating much more rapidly than any oscillation of the particle in the original potential, and we’ll assume that the position of the particle as a function of time can be written as a...This force is oscillating much more rapidly than any oscillation of the particle in the original potential, and we’ll assume that the position of the particle as a function of time can be written as a sum of a “slow motion” \(X(t) \text { and a rapid oscillation } \xi(t)\).
