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- W2427530337 abstract "Dissipative patterns in excitable reaction-diffusion systems can be strongly affected by spatial heterogeneities. Using the photosensitive Belousov-Zhabotinsky reaction, we show a hysteresis effect in the transition between free and pinned spiral rotation. The latter state involves the rotation around a disk-shaped obstacle with an impermeable and inert boundary. The transition is controlled by changes in light intensity. For permeable heterogeneities of higher excitability, we observe spiral drift along both linear and circular boundaries. Our results confirm recent theoretical predictions and, in the case of spiral drift, are further reproduced by numerical simulations with a modified Oregonator model. Additional simulations with a cardiac model show that orbital motion can also exist in anisotropic and three-dimensional systems." @default.
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- W2427530337 date "2016-02-04" @default.
- W2427530337 modified "2023-10-03" @default.
- W2427530337 title "Hysteresis and drift of spiral waves near heterogeneities: From chemical experiments to cardiac simulations" @default.
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- W2427530337 doi "https://doi.org/10.1103/physreve.93.022203" @default.
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