Alvarez-Garrido F, Clerc M G, Gonzalez-Cortes G
Departamento de Física and Millennium Institute for Research in Optics, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 487-3, Santiago, Chile.
Phys Rev Lett. 2020 Apr 24;124(16):164101. doi: 10.1103/PhysRevLett.124.164101.
Out of equilibrium systems under the influence of enough energy injection exhibit complex spatiotemporal behaviors. Based on a liquid crystal light valve experiment with translational optical feedback, we observe propagation, spatiotemporal intermittency, and defect turbulence of striped waves. A prototype model of pattern formation with translational coupling shows the same phenomenology. Close to the spatial instability, a local amplitude equation is derived. This amplitude equation allows us to reveal the origin and bifurcation diagram of the observed complex spatiotemporal dynamics. Experimental observations have a qualitative agreement with theoretical findings.
在足够能量注入影响下的非平衡系统会表现出复杂的时空行为。基于一个带有平移光学反馈的液晶光阀实验，我们观测到条纹波的传播、时空间歇性和缺陷湍流。一个具有平移耦合的图案形成原型模型展现出相同的现象学特征。在接近空间不稳定性时，推导了一个局部振幅方程。这个振幅方程使我们能够揭示所观测到的复杂时空动力学的起源和分岔图。实验观测结果与理论发现有定性的一致性。
