Nontrivial standing wave state in frequency-weighted Kuramoto model
Hong-Jie Bi1, Yan Li2,1, Li Zhou3(), Shu-Guang Guan1()
1. Department of Physics, East China Normal University, Shanghai 200241, China 2. Nantong Middle School, 9 Zhongxuetang Road, Nantong 226001, China 3. No. 4 Middle School Affiliated to ECNU, 279 Luding Road, Shanghai 200062, China
Synchronization in a frequency-weighted Kuramoto model with a uniform frequency distribution is studied. We plot the bifurcation diagram and identify the asymptotic coherent states. Numerical simulations show that the system undergoes two first-order transitions in both the forward and backward directions. Apart from the trivial phase-locked state, a novel nonstationary coherent state, i.e., a nontrivial standing wave state is observed and characterized. In this state, oscillators inside the coherent clusters are not frequency-locked as they would be in the usual standing wave state. Instead, their average frequencies are locked to a constant. The critical coupling strength from the incoherent state to the nontrivial standing wave state can be obtained by performing linear stability analysis. The theoretical results are supported by the numerical simulations.
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