A Discrete 4 System without Peierls-nabarro Barrier

  title={A Discrete 4 System without Peierls-nabarro Barrier},
  author={J M Speight},
  • J M Speight
  • Published 1997
A discrete 4 system is proposed which preserves the topological lower bound on the kink energy. Existence of static kink solutions saturating this lower bound and occupying any position relative to the lattice is proved. Consequently, kinks of the model experience no Peierls-Nabarro barrier, and can move freely through the lattice without being pinned. Numerical simulations reveal that kink dynamics in this system is signiicantly less dissipative than that of the conventional discrete 4 system… CONTINUE READING