  A theory for frequency-dependent magnetic susceptibility \chi(\omega) is
developed for thermally activated magnetic monopoles in kagome ice. By mapping
this system to a two-dimensional (2D) Coulomb gas and then to a sine-Gordon
model, we have shown that the susceptibility has a scaling form
\chi(\omega)/\chi(0)={\cal F}(\omega/\omega_1), where the characteristic
\omega_1 is related to a charge correlation length between diffusively moving
monopoles, and to the sine-Gordon principal breather. The dynamical scaling is
universal among superfluid and superconducting films, and 2D XY magnets above
Kosterlitz-Thouless transitions.

Strongly Correlated Electrons;Statistical Mechanics