Double resonance in star networks of bistable units with disordered signals

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 98-104
• 页数: 7页
• 语种: 英文

摘要

It has been found that a hub node is better able to amplify weak external signals than leaf nodes in star networks.But hub-enhanced amplification is only attained by a single hub node and is limited to weak coupling strength.We show here that random initial phases in external weak signals do not affect the hub-enhanced amplification at weak coupling strength.Instead,they can improve the responses of all the leaf nodes to external signals at large coupling strength,resulting in a double resonance-like signal amplification.We use a reduced model to analyze the influence of the star structure and random initial phases on the emergence of double resonance.