Youbang Sun

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Rohm Electrical Engineering, 8-110

Tsinghua University,

Haidian Dist., Beijing, P. R. China, 100084

I am currently an Assistant Researcher (助理研究员) in the Department of Electrical Engineering at Tsinghua University (2025-now). I am a faculty member of the THU-C3I Lab, my current research focuses on the theory and novel applications for LLM reasoning. I am also interested in safe and robust AI systems.

I obtained my Ph.D. degree in 2025 from the Department of Mechanical & Industrial Engineering at Northeastern University (2021-2025). I am advised by Prof. Shahin Shahrampour. During my Ph.D, my research interest included theory and application of distributed optimization, such as the system dynamics of mirror descent / Riemannian gradient descent algorithms in distributed systems, federated learning and multi-agent reinforcement learning.

I was previously a Ph.D. student in the Department of Industrial Engineering at Texas A&M University (2019-2021). Prior to that, I obtained my B.S. degree in Electrical Engineering from University of Science and Technology of China (2015-2019) as a member of the School of the Gifted Young.

selected publications

  1. On centralized and distributed mirror descent: Convergence analysis using quadratic constraints
    Youbang Sun, Mahyar Fazlyab, and Shahin Shahrampour
    IEEE Transactions on Automatic Control, 2022
  2. Provably fast convergence of independent natural policy gradient for markov potential games
    Youbang Sun, Tao Liu, Ruida Zhou, and 2 more authors
    Advances in Neural Information Processing Systems, 2024
  3. Improving LoRA in Privacy-preserving Federated Learning
    Youbang Sun, Zitao Li, Yaliang Li, and 1 more author
    arXiv preprint arXiv:2403.12313, 2024