2009/11/08 by Sergey V. Dmitriev, Avinash Khare, Dmitriev, Sergey V. +3
Physics and Astronomy · #FOS: Physical sciences #Nonlinear Photonic Systems #Pattern Formation and Solitons (nlin.PS) #Quantum chaos and dynamical systems #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.0911.1515
openalex publication_date 2009/11/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A discrete Klein-Gordon model with asymmetric potential that supports kinks free of the Peierls-Nabarro potential (PNp) is constructed. Undamped ratchet of kinks under harmonic AC driving force is investigated in this model numerically and contrasted with the kink ratchets in the conventional discrete model where kinks experience the PNp. We show that the PNp-free kinks exhibit ratchet dynamics very much different from that reported for the conventional lattice kinks which experience PNp [see, e.g., Phys. Rev. E \bf 73, 066621 (2006)]. Particularly, we could not observe any significant influence of the discreteness parameter on the acceleration of PNp-free kinks induced by the AC driving.