This provides a high-level overview of diffusion models, you know, the models behind Stable Diffusion, Gemini banana, etc.

I haven't read it carefully but I think it's pretty comprehensive. From SDE to Flow matching formulation, and different perspective of constructing the flow maps, i.e. x-formulation or v-formulation. It also deals with distillation and consistency, which is used to fast sampling.

Overall, it's a good read if you are new to the field.