在易兴奋介质中游动的螺纹环
Threaded rings that swim in excitable media
摘要：
心脏组织和Belousov-Zhabotinsky反应提供了支持涡卷波的可激发介质的两个值得注意的例子，其中细丝核心是激发的螺旋波的来源。在这里，我们考虑一种新的拓扑结构，其中一个封闭的细丝环，被称为涡卷环，是由一对反向旋转的细丝，垂直于环的平面和薄介质的边界上结束线程。我们模拟的动力学，这个螺纹环（thring）在光敏Belousov-Zhabotinsky可激发介质中，使用修改后的Oregonator反应扩散方程。这些计算表明，线程拓扑结构引起了一种奇特的运动，其中thring游泳在环的平面。我们提出了一个光模板协议，在光敏Belousov-Zhabotinsky介质中创建一个thring，并提供实验证实，该协议确实产生了一个thring。
英文摘要：
Cardiac tissue and the Belousov-Zhabotinsky reaction provide two notable examples of excitable media that support scroll waves, in which a filament core is the source of spiral waves of excitation. Here we consider a novel topological configuration in which a closed filament loop, known as a scroll ring, is threaded by a pair of counter-rotating filaments that are perpendicular to the plane of the ring and end on the boundary of a thin medium. We simulate the dynamics of this threaded ring (thring) in the photosensitive Belousov-Zhabotinsky excitable medium, using the modified Oregonator reaction-diffusion equations. These computations reveal that the threading topology induces an exotic motion in which the thring swims in the plane of the ring. We propose a light templating protocol to create a thring in the photosensitive Belousov-Zhabotinsky medium and provide experimental confirmation that this protocol indeed yields a thring.
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