Finite-Time Chaos Diagnostics and Noise-Induced Basin Merging in a Two-Dimensional Map
arXiv:2607.26963
2026
Dynamics
2 ideas extracted · analyzed Aug 31, 2026
What the math gives to ML
The paper provides a finite-horizon diagnostic for randomly perturbed discrete dynamical systems: products of independently sampled Jacobians yield finite-time Lyapunov exponents (FTLEs) whose centered and scaled values are approximately Gaussian, while increasing parameter noise can cause distinct attractor basins to merge at a critical noise amplitude. The transferable asset is estimating a distribution and confidence of finite-horizon instability rather than monitoring only an asymptotic or average exponent. The most promising neural-network use is monitoring recurrent or state-space models under stochastic parameter or input perturbations, and using an estimated basin-merging threshold to set robustness noise, scheduled perturbations, or safe operating limits.
Ideas from this paper
△ Mechanism confirmed, baseline not beaten
2026
Treat the hidden-state evolution of an RNN or state-space model as a randomly perturbed map and estimate the distribution of finite-time expansion rates rather than only the spectral radius of an average Jacobian. Penalize high-probability positive FTLEs, allowing the model to remain expressive while controlling rare finite-horizon explosions.
Useful7/10
Difficulty5/10
Novelty7/10
Unverified
2026
Use attractor separation and noise-induced basin coalescence as a robustness test for recurrent networks with multiple learned memories or modes. Estimate the smallest perturbation amplitude at which initially distinct hidden-state attractors become geometrically indistinguishable, then train or operate below that threshold with a safety margin.
Useful6/10
Difficulty6/10
Novelty8/10