Hi~ I am Yusen Zhang, a fourth-year CS PhD student at Penn State University, advised by Dr. Rui Zhang. I have done industry research internships at Amazon, Microsoft, and Google. I also worked closely with Dr. Dragomir Radev. I received my master’s degree from Emory University, advised by Dr. Jinho D. Choi. I am fortunate to be the recipient of the SAC Award of NAACL 2025 and the Best Paper Award of a workshop at AAAI 2025.

I am applying for postdoctoral positions starting in Fall 2025 to advance my research on multi-agent LLM systems. I actively seek opportunities in this area and welcome any related information or openings.

I am also open to academic collaborations—please feel free to reach out if you’re interested in working together! Let’s build the future of LLM together!

Research

My research interests lie in applying Deep Learning for Natural Language Processing, focusing on Natural Language Generation. Specifically, I am interested in the following research topics:

        Scalable, efficient, trustworthy, Collaborative Large Language Model systems.
        Human-centric Large Language Model evaluation and applications.

To answer the following research questions:

1. How can we design mechanisms to facilitate efficient, accurate, and context-aware communication between LLMs?
2. How can we harness the collective intelligence of LLMs to address reasoning challenges and high-stakes decision-making tasks?
3. What technological, ethical, and policy frameworks should we establish to ensure the responsible integration of collaborative LLM systems into society?

News

[2025.5] Two papers were accepted at ACL 2025 Findings. Congrats Xiaoxin and Xi!

[2025.5] One paper on fair summarization was accepted at NACCL 2025, and won the SAC award (25/2346)! Thanks Haoyuan!

[2025.5] AAAR-1.0 was accepted at ICML 2025, and won Best Paper Award at the 2nd AI4Research workshop @ AAAI 2025. Thanks Renze!

[2025.1] Google Blog reports our Chain-of-Agent! Thanks, Google!

[2025.1] One paper was accepted at ICLR 2025, and one was accepted at NAACL 2025. Thanks to Sarkar and Haoyuan Li!

[2024.9] One paper on Multi-Agent LLMs is accepted at NeurIPS 2024. Thanks to all my collaborators!

[2024.7] One paper on LLM error detection is accepted at COLM 2024. Thanks to Ryo and all the collaborators!

[2024.3] Got one paper accepted at NAACL 2024. Thanks to all my collaborators!

[2023.8] Got one paper accepted at EMNLP 2023. Thanks Nan Zhang and other collaborators!

[2023.8] Start Student Researcher Internship at Cloud AI Team @ Google Research, advised by Dr. Ruoxi Sun!

[2023.5] Got one paper accepted at ACL 2023. Thanks to all my collaborators!

[2023.4] Oral talk at MASC-SLL 2023 at Georgetown Mason University (Arlington campus)!

[2023.2] Got one paper accepted at TACL 2023 (acceptance type (a) accepted as is, ~= 5%!). Thanks to all my collaborators!

[2022.12] Give a talk at Westlate NLP on Controllable Text Summarization. Thanks for having me!

[2022.7] Receive Dr. Tse-Yun Feng Graduate Student Award @ PSU CSE. Thanks everyone!

[2022.6] Start Applied Scientist Internship at AWS AI lab @ Amazon Web Service, advised by Dr. Xiaofei Ma!

[2022.2] Got two papers accepted at ACL 2022. Thanks to all my collaborators!

[2022.2] Start Research Internship at Cognitive Service Research Group @ Microsoft Research, advised by Dr. Yang Liu.

[2021.8] Got two papers accepted at EMNLP 2021. Thanks to all my collaborators!

[2021.8] Started my PhD study at NLP Lab @ Penn State. I am fortunate to be supervised by Prof. Rui Zhang!

[2021.5] Got one paper accepted at ACL 2021. Thanks to all my collaborators!

[2021.1] Started to work as a research assistant at Lily Lab @ Yale University, advised by Dr. Dragomir Radev.