A preprint introduces Metropolis-Adjusted Diffusion Models to correct discretization bias in diffusion model samplers by applying Metropolis adjustments to corrector steps

[📄preprint] Diffusion models 🤝 MCMC ! Diffusion model samplers are biased due to discretisation 💡The fix: Metropolis-type adjustment on corrector steps ❗️Challenge: no access to the density ratio, only the score 🔑Insight: the score (and some maths) is all you need... [1/3]