%0 Journal Article
%T Evidence for an unfolded border-collision bifurcation in paced cardiac tissue
%A Carolyn M. Berger
%A Xiaopeng Zhao
%A David G. Schaeffer
%A Hana M. Dobrovolny
%A Wanda Krassowska
%A Daniel J. Gauthier
%J Quantitative Biology
%D 2006
%I arXiv
%X We investigate, both experimentally and theoretically, the bifurcation to alternans in heart tissue. Previously, this phenomenon has been modeled either as a smooth or as border-collision period-doubling bifurcation. Using a new experimental technique, we find a hybrid behavior: very close to the bifurcation point the dynamics are smooth-like, whereas further away they are border-collision-like. This behavior is captured by a new type of model, called an unfolded border-collision bifurcation.
%U http://arxiv.org/abs/q-bio/0607019v1