Bm. Bolotovskii et Av. Serov, CHARACTERISTICS OF THE MOTION OF CHARGED NONRELATIVISTIC PARTICLES INAN ALTERNATING-FIELD, Uspehi fiziceskih nauk, 164(5), 1994, pp. 545-547
It is shown that a particle in an alternating field of force does not
in the general case oscillate around its initial position but undergoe
s a systematic drift. The velocity of the drift depends on initial con
ditions.