Transition to amplitude death in scale-free networks

Transition to amplitude death in scale-free networks
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无标度网络中向振幅死亡的转变

DOI:
10.1088/1367-2630/11/9/093016
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发表时间:
2008-12
影响因子:
3.3
通讯作者:
Wang, Xingang
Wang, Xingang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Liu, Weiqing;Lai, Choy-Heng;Guan, Shuguang;Wang, Xingang

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对非线性振荡器无标度网络中向振幅死亡的转变进行了数值和分析研究。研究发现,随着耦合强度的增加,网络将经历三个不同的阶段来接近完全振幅死亡(CAD)状态。在过渡的第一阶段,振荡器的幅度呈现“阶梯状”排列,即振荡器的平方幅度随着振荡器接收的链路数量(节点度)线性减小。在这个阶段,随着耦合强度的增加,幅度阶梯按节点度降序逐级消除。在第一阶段结束时,除了少数同步振荡器之外,网络中的所有其他振荡器都具有较小的幅度。然后,在过渡的第二阶段,第一阶段形成的同步簇逐渐消失,结果,小幅度振荡器的数量增加。在第二阶段结束时,网络中几乎所有振荡器都具有小但有限的幅度。最后,在过渡的第三阶段,在没有同步簇的支持下,振荡器的幅度迅速减小,最终导致CAD状态。
Transition to amplitude death in scale-free networks of nonlinear oscillators is investigated both numerically and analytically. It is found that, as the coupling strength increases, the network will undergo three different stages in approaching the state of complete amplitude death (CAD). In the first stage of the transition, the amplitudes of the oscillators present a ‘stair-like’ arrangement, i.e. the squared amplitude of an oscillator linearly decreases with the number of links that the oscillator receives (node degree). In this stage, as the coupling strength increases, the amplitude stairs are eliminated hierarchically by descending order of the node degree. At the end of the first stage, except for a few synchronized oscillators, all other oscillators in the network have small amplitudes. Then, in the second stage of the transition, the synchronous clusters formed in the first stage gradually disappear and, as a consequence, the number of small-amplitude oscillators is increased. At the end of the second stage, almost all oscillators in the network have small but finite amplitudes. Finally, in the third stage of the transition, without the support of the synchronous clusters, the amplitudes of the oscillators are quickly decreased, eventually leading to the state of CAD.
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影响因子: 8.6
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