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arXiv · 2601.23262

Particle-Guided Diffusion Models for Partial Differential Equations

Andrew Millard·Fredrik Lindsten·Zheng Zhao
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Abstract

We introduce a guided stochastic sampling method that augments sampling from diffusion models with physics-based guidance derived from partial differential equation (PDE) residuals and observational constraints, ensuring generated samples remain physically admissible. We embed this sampling procedure within a new Sequential Monte Carlo (SMC) framework, yielding a scalable generative PDE solver. Across multiple benchmark PDE systems as well as multiphysics and interacting PDE systems, our method produces solution fields with lower numerical error than existing state-of-the-art generative methods.

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Andrew Millard, Fredrik Lindsten, Zheng Zhao. 2026-01-30. Particle-Guided Diffusion Models for Partial Differential Equations. https://arxiv.org/abs/2601.23262

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