Effective synchronization amid noise-induced chaos

TL;DR

The paper demonstrates that effective synchronization between remote agents' clocks can be achieved even under strong noise conditions, by leveraging statistical independence and phase estimation techniques.

Contribution

It introduces a method for practical synchronization in chaotic noise regimes, extending noise-induced synchronization beyond mild forcing conditions.

Findings

Relatively chaotic clock phases become statistically independent of initial conditions.

Agents can estimate an effective phase that aligns closely with the other's phase.

Synchronization remains feasible even under strong, disruptive noise.

Abstract

Two remote agents with synchronized clocks may use them to act in concert and communicate. This necessitates some means of creating and maintaining synchrony. One method, not requiring any direct interaction between the agents, is to expose them to a common, environmental, stochastic forcing. This "noise-induced synchronization" only occurs under sufficiently mild forcing; stronger forcing disrupts synchronization. We investigate the regime of strong noise, where the clocks' relative phases evolve chaotically. Using a simple realization of disruptive noise, we demonstrate effective synchronization. First, although the relative phases of the two clocks varied erratically, we confirm that they became statistically independent of initial conditions and hence equivalent after a well-defined timescale. Second, we show that an agent can estimate an effective phase that closely agrees with the other's phase. Thus, synchronization is practically attainable beyond the regime of conventional noise-induced synchronization. We finally discuss how it might be used in living systems.