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arXiv 0811.3471nlin.CD
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单向耦合Ikeda时滞系统的相位同步

Phase Synchronization in Unidirectionally Coupled Ikeda Time-delay Systems

D. V. Senthilkumar, M. Lakshmanan, J. Kurths

摘要:

研究了具有复杂拓扑结构和高度交织轨迹的非相位相干超混沌吸引子的单向耦合池田时滞系统的相位同步问题。结果表明,在这组耦合系统中,相位同步(PS)确实存在于一个范围内的耦合强度,这是由过渡制度(近似PS)和非同步制度。然而,精确的广义同步似乎并没有发生在耦合池田系统(的参数范围内,我们已经研究),即使是大的耦合强度,相反,我们以前的研究在耦合分段线性和麦基玻璃系统\cite{dvskml2006,dvskml2008}。上述转换的特征在于基于复发的指标,即广义自相关函数$P(t)$,复发概率的相关性(CPR),联合复发概率(JPR)和复发概率的相似性(SPR)。通过耦合的Ikeda时滞系统的李雅普诺夫指数的典型跃迁和局部化集的概念,进一步证实了相同步的存在性.

英文摘要:

Phase synchronization in unidirectionally coupled Ikeda time-delay systems exhibiting non-phase-coherent hyperchaotic attractors of complex topology with highly interwoven trajectories is studied. It is shown that in this set of coupled systems phase synchronization (PS) does exist in a range of the coupling strength which is preceded by a transition regime (approximate PS) and a nonsynchronous regime. However, exact generalized synchronization does not seem to occur in the coupled Ikeda systems (for the range of parameters we have studied) even for large coupling strength, in contrast to our earlier studies in coupled piecewise-linear and Mackey-Glass systems \cite{dvskml2006,dvskml2008}. The above transitions are characterized in terms of recurrence based indices, namely generalized autocorrelation function $P(t)$, correlation of probability of recurrence (CPR), joint probability of recurrence (JPR) and similarity of probability of recurrence (SPR). The existence of phase synchronization is also further confirmed by typical transitions in the Lyapunov exponents of the coupled Ikeda time-delay systems and also using the concept of localized sets.

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