Spontaneous periodic travelling waves in oscillatory systems with cross-diffusion
Abstract
We identify a new type of pattern formation in spatially distributed active systems. We simulate one-dimensional two-component systems with predator-prey local interaction and pursuit-evasion taxis between the components. In a sufficiently large domain, spatially uniform oscillations in such systems are unstable with respect to small perturbations. This instability, through a transient regime appearing as spontanous focal sources, leads to establishment of periodic traveling waves. The traveling waves regime is established even if boundary conditions do not favor such solutions. The stable wavelength are within a range bounded both from above and from below, and this range does not coincide with instability bands of the spatially uniform oscillations.
Cite
@article{arxiv.0806.0996,
title = {Spontaneous periodic travelling waves in oscillatory systems with cross-diffusion},
author = {V. N. Biktashev and M. A. Tsyganov},
journal= {arXiv preprint arXiv:0806.0996},
year = {2013}
}
Comments
7 pages, 4 figures, as accepted to Phys Rev E 2009/10/26