Han Zhang

hhzhang@cs.ucla.edu

University of California, Los Angeles

I am a second-year PhD student in Computer Science at SCAI Lab, UCLA, where I am fortunate to be advised by Prof. Wei Wang.

Previously, I earned my bachelor’s degree at ACM Honor Class, Shanghai Jiao Tong University. I had a wonderful time as an undergraduate researcher advised by Prof. Weinan Zhang at SJTU APEX Lab and Dr. David Wipf, Quan Gan, Dr. Minjie Wang at Amazon Shanghai AI Lab.

I am broadly interested in Agentic RL, LLM post-training, and LLM agents.

news

Jul 23, 2026	Our paper Single-cell multiomics connects 3D genome and transcriptome alterations in Alzheimer’s disease is published in Science! 🎉
Jul 08, 2026	Our paper FitText: Evolving Agent Tool Ecologies via Memetic Retrieval has been accepted to COLM 2026! 🎉
May 01, 2026	Our paper ARLArena: A Unified Framework for Stable Agentic Reinforcement Learning has been accepted to ICML 2026! 🎉
Feb 01, 2026	I will be joining Meta Superintelligence Labs as a research intern this summer, based in Menlo Park, working on agentic RL training. Feel free to reach out for a coffee chat!

selected publications

ICML

ARLArena: A Unified Framework for Stable Agentic Reinforcement Learning

Xiaoxuan Wang^*, Han Zhang^*, Haixin Wang^*, and 11 more authors

In International Conference on Machine Learning (ICML), 2026

Bib PDF

@inproceedings{wang2026arlarena,
  title = {ARLArena: A Unified Framework for Stable Agentic Reinforcement Learning},
  author = {Wang, Xiaoxuan and Zhang, Han and Wang, Haixin and Shi, Yidan and Li, Ruoyan and Han, Kaiqiao and Tong, Chenyi and Deng, Haoran and Sun, Renliang and Taylor, Alexander and Zhu, Yanqiao and Cong, Jason and Sun, Yizhou and Wang, Wei},
  booktitle = {International Conference on Machine Learning (ICML)},
  year = {2026},
  selected_order = {1},
}

COLM

FitText: Evolving Agent Tool Ecologies via Memetic Retrieval

Kyle Zheng^*, Han Zhang^*, Renliang Sun, and 2 more authors

In Conference on Language Modeling (COLM), 2026

Bib PDF

@inproceedings{zheng2026fittext,
  title = {FitText: Evolving Agent Tool Ecologies via Memetic Retrieval},
  author = {Zheng, Kyle and Zhang, Han and Sun, Renliang and Ye, Chenchen and Wang, Wei},
  booktitle = {Conference on Language Modeling (COLM)},
  year = {2026},
  selected_order = {2},
}

Science

Single-cell multiomics connects 3D genome and transcriptome alterations in Alzheimer’s disease

Yang Zhang, Xinyue Lu, Alexander K. Kunisky, and 15 more authors

Science, 2026

DOI Bib

@article{zhang2026singlecell,
  title = {Single-cell multiomics connects 3D genome and transcriptome alterations in Alzheimer's disease},
  author = {Zhang, Yang and Lu, Xinyue and Kunisky, Alexander K. and Alam, Shahul and Tang, Junjie and Zhang, Ruochi and Wang, Shike and Zhang, Han and Baroudi, Jude and Ichcho, Walid and Jia, Deyong and Ghorbanikalateh, Sahar and Ghorbanikalateh, Sahel and Wang, Shihan and Bennett, David A. and Mathys, Hansruedi and Duan, Zhijun and Ma, Jian},
  journal = {Science},
  volume = {393},
  number = {6809},
  pages = {eadz1652},
  year = {2026},
  doi = {10.1126/science.adz1652},
  url = {https://www.science.org/doi/10.1126/science.adz1652},
  selected_order = {3},
}