Metastability and time scales for parabolic equations with drift 1: the first time scale

C Landim, J Lee, I Seo - Archive for Rational Mechanics and Analysis, 2024 - Springer
Consider the elliptic operator given by 0.1 L ε f= b·∇ f+ ε Δ f for some smooth vector field b: R
d→ R d and a small parameter ε> 0. Consider the initial-valued problem 0.2∂ tu ε= L ε u ε, u …

Hierarchical structure of metastability in the reversible inclusion process: third time scale and complete characterization

S Kim - arXiv preprint arXiv:2308.13842, 2023 - arxiv.org
In this article, we study the hierarchical structure of metastability in the reversible inclusion
process. We fully characterize the third time scale of metastability subject to any underlying …

Eyring–Kramers law for Fokker–Planck type differential operators

JF Bony, D Le Peutrec, L Michel - Journal of the European Mathematical …, 2024 - ems.press
Abstract We consider Fokker–Planck type differential operators associated with general
Langevin processes admitting a Gibbs stationary distribution. Under assumptions ensuring …

Path integral derivation and numerical computation of large deviation prefactors for non-equilibrium dynamics through matrix Riccati equations

F Bouchet, J Reygner - Journal of Statistical Physics, 2022 - Springer
For many non-equilibrium dynamics driven by small noise, in physics, chemistry, biology, or
economy, rare events do matter. Large deviation theory then explains that the leading order …

Metastability from the large deviations point of view: A Γ-expansion of the level two large deviations rate functional of non-reversible finite-state Markov chains

C Landim - Stochastic Processes and their Applications, 2023 - Elsevier
Consider a sequence of continuous-time Markov chains (X t (n): t≥ 0) evolving on a fixed
finite state space V. Let I n be the level two large deviations rate functional for X t (n), as …

Metastable -expansion of finite state Markov chains level two large deviations rate functions

L Bertini, D Gabrielli, C Landim - arXiv preprint arXiv:2207.02588, 2022 - arxiv.org
We examine two analytical characterisation of the metastable behavior of a Markov chain.
The first one expressed in terms of its transition probabilities, and the second one in terms of …

Approximation method to metastability: an application to non-reversible, two-dimensional Ising and Potts models without external fields

S Kim, I Seo - arXiv preprint arXiv:2212.13746, 2022 - arxiv.org
The main contribution of the current study is two-fold. First, we investigate the energy
landscape of the Ising and Potts models on finite two-dimensional lattices without external …

Asymptotic stability and cut-off phenomenon for the underdamped Langevin dynamics

S Lee, M Ramil, I Seo - arXiv preprint arXiv:2311.18263, 2023 - arxiv.org
In this article, we provide detailed analysis of the long-time behavior of the underdamped
Langevin dynamics. We first provide a necessary condition guaranteeing that the zero-noise …

Energy landscape and metastability of stochastic Ising and Potts models on three-dimensional lattices without external fields

S Kim, I Seo - Electronic Journal of Probability, 2024 - projecteuclid.org
In this study, we investigate the energy landscape of the Ising and Potts models on fixed and
finite but large three-dimensional (3D) lattices where no external field exists and …

Non-reversible metastable diffusions with Gibbs invariant measure II: Markov chain convergence

J Lee, I Seo - Journal of Statistical Physics, 2022 - Springer
This article considers a class of metastable non-reversible diffusion processes whose
invariant measure is a Gibbs measure associated with a Morse potential. In a companion …