Highly Influenced

# Tail resonances of Fermi-Pasta-Ulam q-breathers and their impact on the pathway to equipartition.

@article{Penati2007TailRO, title={Tail resonances of Fermi-Pasta-Ulam q-breathers and their impact on the pathway to equipartition.}, author={Tiziano Penati and Sergej Flach}, journal={Chaos}, year={2007}, volume={17 2}, pages={023102} }

- Published 2007 in Chaos

Upon initial excitation of a few normal modes the energy distribution among all modes of a nonlinear atomic chain (the Fermi-Pasta-Ulam model) exhibits exponential localization on large time scales. At the same time, resonant anomalies (peaks) are observed in its weakly excited tail for long times preceding equipartition. We observe a similar resonant tail structure also for exact time-periodic Lyapunov orbits, coined q-breathers due to their exponential localization in modal space. We give a… CONTINUE READING