论文标题
耦合的不稳定性驱动式级订购disorder transorders in faraday Waves
Coupled instabilities drive quasiperiodic order-disorder transitions in Faraday waves
论文作者
论文摘要
我们介绍了在圆形法拉第系统中高度有序的方形晶格模式与无序，缺陷式折扣状态之间的准二元过渡的实验研究。我们表明，过渡最初是由长波振幅调节不稳定性驱动的，这激发了振荡性过渡相的不稳定性，从而导致法拉第晶格中的位错形成。位错的出现潮湿幅度调制，从而阻止了进一步的缺陷被创建，并使系统可以放松到其有序状态。然后，该过程以准静态方式重复。我们的实验揭示了法拉第系统中两个不同的不稳定性之间的令人惊讶的耦合，并表明这种耦合可以为非线性驱动耗散系统中的逆时治性提供通用的机制。
We present an experimental study of quasiperiodic transitions between a highly ordered square-lattice pattern and a disordered, defect-riddled state, in a circular Faraday system. We show that the transition is driven initially by a long-wave amplitude modulation instability, which excites the oscillatory transition phase instability, leading to the formation of dislocations in the Faraday lattice. The appearance of dislocations damps amplitude modulations, which prevents further defects from being created and allows the system to relax back to its ordered state. The process then repeats itself in a quasiperiodic manner. Our experiments reveal a surprising coupling between two distinct instabilities in the Faraday system, and suggest that such coupling may provide a generic mechanism for quasiperiodicity in nonlinear driven dissipative systems.
