Synchronization of Globally Coupled Nonlinear Oscillators
The Rich Behavior of the Kuramoto Model
The Kuramoto Model
The Kuramoto Model makes the following simplifying assumptions
about the oscillators and the coupling:
- All-to-all, weak coupling
- Nearly identical oscillators
- Interactions that depend sinusoidally on the phase difference
between two oscillators
|The Kuramoto model equation:
where theta is the phase of each oscillator, omega is the natural
frequency of each oscillator, N is the number of oscillators, and K is
the coupling constant.
Kuramoto found that there is a certain value of the coupling constant, KC,
above which synchronization can occur, and below which it cannot.
For any distribution of the natural frequencies of the oscillators, he
was able to calculate KC.
For example, for a Lorentzian distribution of natural frequencies, KC
is just equal to the full width at half-max of the Lorentzian
curve. For other distributions, the formula for KC
is more complex, but we can still calculate it.
|In our simulations, we often
Lorentzian for the distribution of the oscillators' natural
frequencies. Here a Lorentzian distribution is shown as a solid
line, with a Gaussian distribution as a dotted line for comparison.