title: Antispiral waves in reaction-diffusion systems.
abstract: We report spontaneous antispiral wave formation in typical reaction-diffusion systems. Our findings qualitatively reproduce a series of phenomena recently observed in a Belousov-Zhabotinsky-type chemical reaction. We found that antispiral waves can occur only near the Hopf bifurcation, when the system is characterized by small amplitude oscillatory (as opposed to excitable) dynamics. For reaction-diffusion systems in the vicinity of the Hopf bifurcation, the specific conditions required for antispiral formation are established here through theoretical analyses and numerical simulations. Thus, this work provides a comprehensive description of the mechanisms underlying antispiral waves in reaction-diffusion systems.
authors.affiliation: Division of Cardiology, Department of Medicine, Weill Medical College of Cornell University, New York, New York 10021, USA.
authors.forename: Yunfan
authors.initials: Y
authors.lastname: Gong
authors.forename: David J
authors.initials: DJ
authors.lastname: Christini