Study on phase synchronization of stochastic chaotic system

• 来源期刊: 中国物理B(英文版)
• 关键词: chaotic phase synchronization coupling bounded noise
• 年，卷（期）: 2008,（6）
• 页码范围: 2004-2009
• 页数: 6页
• 语种: 英文

摘要

This paper detects and characterizes the diverse roles played by bounded noise in chaotic phase synchronization (CPS) of weakly coupled nonlinear stochastic systems. Analysis of a paradigmatic model of two bidirectional coupled three-level food chains is carried out by various statistical measures such as Shannon entropy and mutual information. The results indicate that inside the synchronous regime, CPS is considerably reduced under the influence of bounded noise; near the onset of phase synchronization, temporal phase locking is diversely changed with the increase of noise, i.e., either weak or strong noise also degrades the degree of CPS, while intermediate noise enhances CPS remarkably, and an optimal noise intensity is detected that maximizes the enhancement.