5 citations · 14 across the 6 of their papers we have counts for
6 papers
Diversity of dynamical behaviors due to initial conditions: exact results with extended Ott--Antonsen ansatz for identical Kuramoto--Sakaguchi phase oscillators
Akihisa Ichiki, Keiji Okumura
The Ott--Antonsen ansatz is a powerful tool to extract the behaviors of coupled phase oscillators, but it imposes a strong restriction on the initial condition. Herein, a systemati…
Chaotic synchronization induced by external noise in coupled limit cycle oscillators
Keiji Okumura, Akihisa Ichiki
A solvable model of noise effects on globally coupled limit cycle oscillators is proposed. The oscillators are under the influence of independent and additive white Gaussian noise.…
Asymmetry in cilia configuration induces hydrodynamic phase locking
Keiji Okumura, Seiya Nishikawa, Toshihiro Omori +2
To gain insight into the nature of biological synchronization at the microscopic scale, we here investigate the hydrodynamic synchronization between conically rotating objects term…
Stochastic phenomena of synchronization in ensembles of mean-field coupled limit cycle oscillators with two native frequencies
K. Okumura, A. Ichiki, M. Shiino
We study effects of independent white noise on synchronization phenomena in ensembles of coupled limit cycle oscillators with different native frequencies. We consider a simple mod…
Analytical Approach to Noise Effects on Synchronization in a System of Coupled Excitable Elements
K. Okumura, M. Shiino
We report relationships between the effects of noise and applied constant currents on the behavior of a system of excitable elements. The analytical approach based on the nonlinear…
Effects of noise on synchronization phenomena exhibited by mean-field coupled limit cycle oscillators with two natural frequencies
K. Okumura, A. Ichiki, M. Shiino
Relationships between inter-cluster synchronization phenomena and external noise are studied on the basis of noise level-free analysis. We consider a mean-field model of ensembles…