Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany and The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
Phys Rev Lett. 2014 Apr 4;112(13):134102. doi: 10.1103/PhysRevLett.112.134102. Epub 2014 Apr 2.
We demonstrate the emergence of self-organized structures in the course of the relaxation of an initially excited, dissipative, and finite chain of interacting particles in a periodic potential towards its many particle equilibrium configuration. Specifically, we observe a transition from an in phase correlated motion via phase randomized oscillations towards oscillations with a phase difference π between adjacent particles thereby yielding the growth of long time transient spatiotemporal oscillation patterns. Parameter modifications allow for designing these patterns, including steady states and even states that combine in phase and correlated out of phase oscillations along the chain. The complex relaxation dynamics is based on finite size effects together with an evolution running from the nonlinear to the linear regime, thereby providing a highly unbalanced population of the center-of-mass and relative motion.
我们展示了在一个周期性势中相互作用的粒子的初始激发、耗散和有限链松弛过程中自组织结构的出现，以达到其多粒子平衡构型。具体来说，我们观察到从相位相关的运动通过相位随机化的振荡到相邻粒子之间具有相位差π的振荡的转变，从而产生长时间瞬态时空振荡模式的增长。参数修改允许设计这些模式，包括稳态甚至状态，它们沿着链组合相位相关和相位无关的振荡。复杂的弛豫动力学基于有限尺寸效应以及从非线性到线性的演变，从而提供了高度不平衡的质心和相对运动的种群。
