3 papers
math.PR2026
Characterizing stochastic inertia: when does noise increase escape times?
Robin Chemnitz, Maximilian Engel, Péter Koltai
Motivated by observations in atmospheric modelling, we investigate the effect of ``stochastic inertia'': in certain dynamical systems, small noise induces trajectories to stay long…
math.NA2026
Noise-induced enhancement of regime lifetimes -- A data-driven approach using deterministic trajectories
Henry Schoeller, Robin Chemnitz, Péter Koltai +2
We investigate the lifetime of dynamical regimes under the impact of noise motivated by low-dimensional models of the atmosphere. One may expect that the inclusion of noise tends t…
math.DS2024
Extracting coherent sets in aperiodically driven flows from generators of Mather semigroups
Robin Chemnitz, Maximilian Engel, Péter Koltai
Coherent sets are time-dependent regions in the physical space of nonautonomous flows that exhibit little mixing with their neighborhoods, robustly under small random perturbations…