Document Type
Article
Publication Date
3-2015
Publication Title
Physical Review Letters
Volume
114
Issue
11
Pages
118303
DOI
10.1103/PhysRevLett.114.118303
Abstract
We explore the shape and the dynamics of scroll-wave filaments in excitable media with an abruptly changing diffusion tensor, important for cardiac applications. We show that, similar to a beam of light, the filament refracts at the boundary separating domains with different diffusion. We derive the laws of filament refraction and test their validity in computational experiments. We discovered that at small angles to the interface, the filament can become unstable and develop oscillations. The nature of the observed instabilities, as well as overall theoretical and experimental significance of the findings, is discussed.
Original Publication Citation
Zemlin, C.W., Varghese, F., Wellner, M., & Pertsov, A.M. (2015). Refraction of scroll-wave filaments at the boundary between two reaction-diffusion media. Phys Rev Lett, 114(11), 118303. doi: 10.1103/PhysRevLett.114.118303
Repository Citation
Zemlin, Christian W.; Varghese, Frency; Wellner, Marcel; and Pertsov, Arkady M., "Refraction of Scroll-Wave Filaments at the Boundary between Two Reaction-Diffusion Media" (2015). Bioelectrics Publications. 30.
https://digitalcommons.odu.edu/bioelectrics_pubs/30