Generation of finite wave trains in excitable media

Abstract

Spatiotemporal control of excitable media is of paramount importance in the development of new applications, ranging from biology to physics. To this end we identify and describe a qualitative property of excitable media that enables us to generate a sequence of traveling pulses of any desired length, using a one-time initial stimulus. The wave trains are produced by a transient pacemaker generated by a one-time suitably tailored spatially localized finite amplitude stimulus, and belong to a family of fast pulse trains. A second family, of slow pulse trains, is also present. The latter are created through a clumping instability of a traveling wave state (in an excitable regime) and are inaccessible to single localized stimuli of the type we use. The results indicate that the presence of a large multiplicity of stable, accessible, multi-pulse states is a general property of simple models of excitable media.

6 pages, 6 figures

Cited by in corpus (5)

• Six decades of the FitzHugh-Nagumo model: A guide through its spatio-temporal dynamics and influence across disciplines
• Bifurcation structure of traveling pulses in Type-I excitable media
• Origin of Jumping Oscillons in an Excitable Reaction-Diffusion System
• Amplitude equations for wave bifurcations in reaction-diffusion systems
• Traveling spatially localized convective structures in an inclined porous medium