Chaotic dynamics and two-field inflation

We demonstrate the existence of chaos in realistic models of two-held infla tion. The chaotic motion takes place after the end of inflation, when the f ields are free to oscillate and their motion is only lightly damped by the expansion of the universe. We then investigate whether the presence of chao s affects the predictions of two-field models, and show that chaos enhances the production of topological defects and renders the growth rate of the u niverse sensitively dependent upon the 'initial' conditions at the beginnin g of the oscillatory era.