arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1707.02249nlin.AO
收藏

具有非均匀相互作用时滞的Kuramoto模型的稳定性图、滞回、临界时滞和频率

Stability Diagram, Hysteresis, and Critical Time Delay and Frequency for the Kuramoto Model with Heterogeneous Interaction Delays

Per Sebastian Skardal

摘要:

我们研究了具有异质相互作用时滞的Kuramoto振子大系统的全局耦合动力学。对于指数分布时滞的情况下,我们推导出完整的稳定性图,描述在系统中的分支。特别令人感兴趣的是滞后的发病的非相干和部分同步状态是稳定的耦合强度的范围内-这发生在一个codimension-two点之间的交叉点的Hopf bifucration和鞍结分叉的周期。通过研究这一余维两点,我们发现的特征时间延迟和固有频率的双稳态存在的全套,并确定临界时间延迟和临界固有频率,低于它不存在双稳态。最后,我们研究了更一般的系统,其中的时间延迟是从伽马分布的动态,发现更均匀的时间延迟分布往往都促进同步的发病和抑制滞后的存在。

英文摘要:

We investigate the dynamics of large, globally-coupled systems of Kuramoto oscillators with heterogeneous interaction delays. For the case of exponentially distributed time delays we derive the full stability diagram that describes the bifurcations in the system. Of particular interest is the onset of hysteresis where both the incoherent and partially synchronized states are stable for a range of coupling strengths -- this occurs at a codimension-two point at the intersection between a Hopf bifucration and saddle-node bifurcation of cycles. By studying this codimension-two point we find the full set of characteristic time delays and natural frequencies where bistability exists and identify the critical time delay and critical natural frequency below which bistability does not exist. Finally, we examine the dynamics of the more general system where time delays are drawn from a Gamma distribution, finding that more homogeneous time delay distributions tend to both promote the onset of synchronization and inhibit the presence of hysteresis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑