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Suppression of dynamics and frequency synchronization in coupled slow and fast dynamical systems

机译:耦合的慢速和快速动力学系统中的动力学和频率同步抑制

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摘要

We present our study on the emergent states of two interacting nonlinear systems with differing dynamical time scales. We find that the inability of the interacting systems to fall in step leads to difference in phase as well as change in amplitude. If the mismatch is small, the systems settle to a frequency synchronized state with constant phase difference. But as mismatch in time scale increases, the systems have to compromise to a state of no oscillations. We illustrate this for standard nonlinear systems and identify the regions of quenched dynamics in the parameter plane. The transition curves to this state are studied analytically and confirmed by direct numerical simulations. As an important special case, we revisit the well-known model of coupled ocean-atmosphere system used in climate studies for the interactive dynamics of a fast oscillating atmosphere and slowly changing ocean. Our study in this context indicates occurrence of multi stable periodic states and steady states of convection coexisting in the system, with a complex basin structure.
机译:我们目前对两个具有不同动态时标的相互作用非线性系统的出现状态进行研究。我们发现,相互作用的系统无法同步下降会导致相位差异以及振幅变化。如果失配很小,则系统将稳定到具有恒定相位差的频率同步状态。但是随着时间尺度的不匹配增加,系统必须折衷为无振荡的状态。我们针对标准非线性系统对此进行了说明,并确定了参数平面中淬火动力学的区域。对该状态的过渡曲线进行了分析研究,并通过直接数值模拟进行了确认。作为一个重要的特殊情况,我们重新审视了气候研究中使用的著名的海洋-大气耦合系统模型,以研究快速振荡的大气和缓慢变化的海洋的相互作用。在这种情况下,我们的研究表明系统中同时存在多个稳定周期状态和对流稳定状态,并且盆地结构复杂。

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