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- W2076457832 abstract "We study the erratic displacement of spiral waves forced to move in a medium with random spatiotemporal excitability. Analytical work and numerical simulations are performed in relation to a kinematic scheme, assumed to describe the autowave dynamics for weakly excitable systems. Under such an approach, the Brownian character of this motion is proved and the corresponding dispersion coefficient is evaluated. This quantity shows a nontrivial dependence on the temporal and spatial correlation parameters of the external fluctuations. In particular, a resonantlike behavior is neatly evidenced in terms of the noise correlation time for the particular situation of spatially uniform fluctuations. Actually, this case turns out to be, to a large extent, exactly solvable, whereas a pair of dispersion mechanisms are discussed qualitatively and quantitatively to explain the results for the more general scenario of spatiotemporal disorder." @default.
- W2076457832 created "2016-06-24" @default.
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- W2076457832 date "2001-03-22" @default.
- W2076457832 modified "2023-10-06" @default.
- W2076457832 title "Noise-induced Brownian motion of spiral waves" @default.
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- W2076457832 doi "https://doi.org/10.1103/physreve.63.046205" @default.
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