  We study the dynamics of a skyrmion in a magnetic insulating nanowire in the
presence of time-dependent oscillating magnetic field gradients. These ac
fields act as a net driving force on the skyrmion via its own intrinsic
magnetic excitations. In a microscopic quantum field theory approach we include
the unavoidable coupling of the external field to the magnons, which gives rise
to time-dependent dissipation for the skyrmion. We demonstrate that the
magnetic ac field induces a super-Ohmic to Ohmic crossover behavior for the
skyrmion dissipation kernels with time-dependent Ohmic terms. The ac driving of
the magnon bath at resonance results in a unidirectional helical propagation of
the skyrmion in addition to the otherwise periodic bounded motion.
