涡卷波对运动非均匀性的钉扎
Scroll Waves Pinned to Moving Heterogeneities
摘要：
三维可激发系统可以自组织涡旋模式，围绕称为细丝的一维相位奇点旋转。在Belousov-Zhabotinsky反应和数值模拟的实验中，我们将这些涡卷波固定在移动的不均匀性上，并展示了它们的旋转中心的受控重新定位。如果钉扎位点仅沿着细丝的一部分延伸，则相位奇点沿着异质性的轨迹伸展，这有效地将奇点写入系统中。其尾端点跟随非均质，速度较低。这个速度，它的依赖于锚的位置，和形状的细丝的曲率流模型解释。
英文摘要：
Three-dimensional excitable systems can selforganize vortex patterns that rotate around one-dimensional phase singularities called filaments. In experiments with the Belousov-Zhabotinsky reaction and numerical simulations, we pin these scroll waves to moving heterogeneities and demonstrate the controlled repositioning of their rotation centers. If the pinning site extends only along a portion of the filament, the phase singularity is stretched out along the trajectory of the heterogeneity which effectively writes the singularity into the system. Its trailing end point follows the heterogeneity with a lower velocity. This velocity, its dependence on the placement of the anchor, and the shape of the filament are explained by a curvature flow model.
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