Dynamical spin localization of spinor condensate driven by external magnetic fields

We study the dynamical response of a spinor Bose condensate under the influence of external magnetic fields which have both a random and a time varying systematic component. We find that the external noise may eventually destroy the Rabi oscillation and dynamical spin localization. The destruction of the Rabi oscillation due to the noise is much easier than that of the dynamical spin localization.