Fast Samplers for Inverse Problems in Iterative Refinement Models

Iterative refinement models, such as diffusion generative models and flow matching methods [Sohl-Dickstein et al., 2015, Ho et al., 2020, Song et al., 2020, Lipman et al., 2023, Albergo and V anden-Eijnden, 2023], have seen increasing popularity in recent months, and much effort has been invested