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Synchronization.

Couple two oscillators and inspect their phase difference over time.

Interactive experimentintuitiveField note ·
INTERACTIVE EXPERIMENT / M29

Synchronization

Couple two oscillators and inspect their phase difference over time.

TEST THE MECHANISM

Two oscillators have natural speeds 1 and 1.4 radians per time unit. Positive coupling pulls their phases together. Frequency locking can retain a nonzero phase gap.

01
Time
0.0
Wrapped phase gap
1.00 rad
Locking possible
No stable lock
-3.10.03.1
Phase difference over time · Scale -3.1 to 3.1 · Integration steps (0.05 time units)Wrapped phase gap

The two-node Kuramoto equations use equal positive coupling. A vertical wrap at ±π is a plotting boundary, not a sudden physical jump.

A two-node positively coupled phase model omits amplitude, noise and network structure. A wrapped plotting jump is not a physical discontinuity.

THE SHORT VERSION

Synchronization, explained.

Synchronization is coordination of dynamical rhythms through interaction, often including frequency locking despite different uncoupled frequencies.

01 / THE MECHANISM

Why it happens

Two phase oscillators have natural angular speeds one and 1.4 with symmetric positive Kuramoto coupling K. Integration uses steps of 0.05. Stable locking requires K greater than 0.2 and can retain a nonzero phase gap.

Synchronization is coordination of dynamical rhythms through interaction, often including frequency locking despite different uncoupled frequencies.

Read the result

A stable phase gap indicates frequency locking, not necessarily equal phase. Plot wraps at plus or minus pi are coordinate changes.

02 / FOLLOW IT THROUGH

A worked example

Couple two initially different rhythms

  1. Advance the uncoupled oscillators to see the phase difference drift under speeds one and one point four.

  2. Raise coupling above zero point two and allow several model time units for a stable gap to emerge.

  3. Compare the bounded gap with the uncoupled drift while retaining the finite integration and two-node assumptions.

OPTIONAL DEEPER DETAILGo deeper: inside the model

Inside this model

Two phase oscillators have natural angular speeds one and 1.4 with symmetric positive Kuramoto coupling K. Integration uses steps of 0.05. Stable locking requires K greater than 0.2 and can retain a nonzero phase gap.

03 / BEYOND THE EXPERIMENT

Where this idea is useful

A practical use

When two rhythms align, ask what interaction supplies coupling and whether frequency matching also implies identical phase.

CHECK YOUR INTUITION

A common misconception

THE TEMPTING CONCLUSION

“Synchronisation requires both hands to point in exactly the same direction.”

THE MORE USEFUL DISTINCTION

Frequency-locked oscillators can maintain a stable nonzero phase difference when their natural frequencies differ.

What this explanation leaves out

  • A two-node positively coupled phase model omits amplitude, noise and network structure. A wrapped plotting jump is not a physical discontinuity.
ONE MORE QUESTION

Why does the phase plot sometimes jump vertically?

Angles are wrapped to the interval from minus pi to pi; crossing that reporting boundary does not make the physical oscillator jump.

TAKE THE IDEA WITH YOU

Are two processes sharing a frequency, a phase, or only an occasional coincidence?

Associated thinkers

Associated withYoshiki Kuramoto ↗

Associations marked provisional are awaiting source review.

Further reading

Explore the original research or the teaching reference behind this experiment.