TORUS DOUBLING NONLINEAR DYNAMICS IN KDP CRYSTAL NEAR PHASE-TRANSITION

Abstract

Experimental observation of the torus doubling nonlinear dynamic signals was made, in the KDP crystal near the ferroelectric phase transition, which implicates time-dependent fluctuation effects in phase transition dynamics beyond the Ginzburg-Landau approximation. Experimental observations seem to suggest that the relevant fluctuations are not random but deterministic.