Preprints & Publications

(In reversed chronological order. * denotes equal contribution or alphabetical order.)

2026

  1. rethink.jpg
    ICML 2026
    Rethinking the Design Space of Reinforcement Learning for Diffusion Models: On the Importance of Likelihood Estimation Beyond Loss Design
    Jaemoo Choi*Yuchen Zhu*Wei GuoPetr MolodykBo Yuan, Jinbin Bai, Yi Xin, Molei Tao, and Yongxin Chen
    In Forty-third International Conference on Machine Learning, 2026
    TL;DRShows that ELBO-based likelihood estimation is a simple yet effective design axis for RL with diffusion models.
  2. metadns.jpg
    ICML 2026
    MetaDNS: Enhancing Exploration in Discrete Neural Samplers via Metadynamics
    Xiaochen DuJuno NamJaemoo ChoiWei Guo, Sathya Edamadaka, Junyi Sha, Elton Pan, Yongxin ChenMolei Tao, and Rafael Gómez-Bombarelli
    In Forty-third International Conference on Machine Learning, 2026
    TL;DRProposes a metadynamics-inspired technique to enhance exploration in discrete neural samplers.
  3. jeais.jpg
    ICLR 2026
    Complexity Analysis of Normalizing Constant Estimation: from Jarzynski Equality to Annealed Importance Sampling and beyond
    Wei GuoMolei Tao, and Yongxin Chen
    In The Fourteenth International Conference on Learning Representations, 2026
    TL;DRGives a unified complexity analysis for normalizing constant estimation methods: from Jarzynski equality to annealed importance sampling and reverse diffusion sampler.
  4. dasbs.jpg
    ICML 2026
    Discrete Adjoint Schrödinger Bridge Sampler
    In Forty-third International Conference on Machine Learning, 2026
    TL;DRAn authentic extension of adjoint matching to discrete state spaces: adjoint matching = target matching + fixed-point iteration.
  5. pdns.jpg
    ICLR 2026
    Proximal Diffusion Neural Sampler
    In The Fourteenth International Conference on Learning Representations, 2026
    TL;DRProximal point updates on path-measure space for stable and efficient neural sampler training.
  6. replaid.jpg
    Preprint
    Continuous Diffusion Scales Competitively with Discrete Diffusion for Language
    arXiv preprint arXiv:2605.18530, 2026
    TL;DRWe establish the first scaling law for continuous diffusion language models (DLMs) that rivals discrete DLMs.
  7. Preprint
    Efficient Adjoint Matching for Fine-tuning Diffusion Models
    Jeongwoo Shin*, Dongsoo Shin*, Yuchen ZhuWei GuoYongxin Chen, Joonseok Lee, Jaewoong Choi, and Jaemoo Choi
    arXiv preprint arXiv:2605.11480, 2026
    TL;DRProposes an efficient adjoint matching method by reformulating SOC problem with a linear base drift and a modified terminal cost.
  8. dmpo.jpg
    ICML 2026 Spotlight
    Enhancing Reasoning for Diffusion LLMs via Distribution Matching Policy Optimization
    In Forty-third International Conference on Machine Learning (Spotlight, top 2.2%), 2026
    TL;DRDistribution matching policy optimization via weighted denoising cross-entropy: a new RL paradigm beyond policy gradients.

2025

  1. almc.jpg
    ICLR 2025
    Provable Benefit of Annealed Langevin Monte Carlo for Non-log-concave Sampling
    Wei GuoMolei Tao, and Yongxin Chen
    In The Thirteenth International Conference on Learning Representations, 2025
    TL;DRProvides a theoretical guarantee of the convergence of annealed Langevin Monte Carlo from the perspective of optimal transport and Girsanov’s theorem.
  2. fast_solver.jpg
    NeurIPS 2025
    Fast solvers for discrete diffusion models: Theory and applications of high-order algorithms
    In The Thirty-ninth Annual Conference on Neural Information Processing Systems, 2025
    TL;DRDevelops high-order numerical solvers that accelerate discrete diffusion models with theoretical guarantees and practical gains.
  3. mdns.jpg
    NeurIPS 2025
    MDNS: Masked Diffusion Neural Sampler via Stochastic Optimal Control
    In The Thirty-ninth Annual Conference on Neural Information Processing Systems, 2025
    TL;DRFrames masked diffusion neural sampling as a stochastic optimal control problem for efficient discrete neural sampler training.

2024

  1. Preprint
    Plug-and-Play Controllable Generation for Discrete Masked Models
    Wei Guo*Yuchen Zhu*Molei Tao, and Yongxin Chen
    arXiv preprint arXiv:2410.02143, 2024
    TL;DRDevelops a plug-and-play control method for steering masked discrete diffusion models.

2023

  1. Undergrad Thesis
    Theoretical Analysis of the Approximation Properties of Score-Based Generative Models
    Wei Guo
    Undergraduate Thesis, School of Mathematical Sciences, Peking University, 2023
    TL;DRStudies the convergence guarantees of score-based generative models given an imperfect score estimator and discretization errors.