Improved sampling via learned diffusions

L Richter, J Berner - arXiv preprint arXiv:2307.01198, 2023 - arxiv.org
Recently, a series of papers proposed deep learning-based approaches to sample from
target distributions using controlled diffusion processes, being trained only on the …

Solving high-dimensional Hamilton–Jacobi–Bellman PDEs using neural networks: perspectives from the theory of controlled diffusions and measures on path space

N Nüsken, L Richter - Partial differential equations and applications, 2021 - Springer
Optimal control of diffusion processes is intimately connected to the problem of solving
certain Hamilton–Jacobi–Bellman equations. Building on recent machine learning inspired …

An optimal control perspective on diffusion-based generative modeling

J Berner, L Richter, K Ullrich - arXiv preprint arXiv:2211.01364, 2022 - arxiv.org
We establish a connection between stochastic optimal control and generative models based
on stochastic differential equations (SDEs), such as recently developed diffusion …

Overcoming the timescale barrier in molecular dynamics: Transfer operators, variational principles and machine learning

C Schütte, S Klus, C Hartmann - Acta Numerica, 2023 - cambridge.org
One of the main challenges in molecular dynamics is overcoming the 'timescale barrier': in
many realistic molecular systems, biologically important rare transitions occur on timescales …

Stein variational model predictive control

A Lambert, A Fishman, D Fox, B Boots… - arXiv preprint arXiv …, 2020 - arxiv.org
Decision making under uncertainty is critical to real-world, autonomous systems. Model
Predictive Control (MPC) methods have demonstrated favorable performance in practice …

Data assimilation: the Schrödinger perspective

S Reich - Acta Numerica, 2019 - cambridge.org
Data assimilation addresses the general problem of how to combine model-based
predictions with partial and noisy observations of the process in an optimal manner. This …

Robust SDE-based variational formulations for solving linear PDEs via deep learning

L Richter, J Berner - International Conference on Machine …, 2022 - proceedings.mlr.press
Abstract The combination of Monte Carlo methods and deep learning has recently led to
efficient algorithms for solving partial differential equations (PDEs) in high dimensions …

Bayesian learning via neural Schrödinger–Föllmer flows

F Vargas, A Ovsianas, D Fernandes, M Girolami… - Statistics and …, 2023 - Springer
In this work we explore a new framework for approximate Bayesian inference in large
datasets based on stochastic control. We advocate stochastic control as a finite time and low …

Transition path theory for Langevin dynamics on manifolds: Optimal control and data-driven solver

Y Gao, T Li, X Li, JG Liu - Multiscale Modeling & Simulation, 2023 - SIAM
We present a data-driven point of view for rare events, which represent conformational
transitions in biochemical reactions modeled by overdamped Langevin dynamics on …

Stochastic control and nonequilibrium thermodynamics: Fundamental limits

Y Chen, TT Georgiou… - IEEE transactions on …, 2019 - ieeexplore.ieee.org
We consider damped stochastic systems in a controlled (time varying) potential and study
their transition between specified Gibbs-equilibria states in finite time. By the second law of …