I am a 2nd-year Ph.D. student at the University of Wisconsin-Madison Computer Sciences department. I am advised by Professor Sharon Li.

My research focuses on building reliable and trustworthy AI systems, with an emphasis on data-centric alignment and hallucination detection in large language models (LLMs). I study how preference feedback data impact alignment, and develop benchmarks and methods to detect hallucinations under challenging settings, such as long-form generations and retrieval-augmented generations.

Research Interests

• Relaible Machine Learning
• Hallucination Detection
• Data-centric AI Alignment

📌 I am actively seeking internship opportunities for 2026 Summer!

📢 News [01.26.2026] Our two papers on Hallucination in RAG and LLM Deception has been accepted at ICLR 2026! 🎉

[10.21.2025] Our TMLR paper on Entity-level Hallucination Detection has been awarded a J2C Certification and will be presented at ICLR 2026! 🎉

[09.18.2025] Our paper on Preference Data Cleaning has been accepted at NeurIPS 2025! 🎉

Selected Publications

Full list of publications in Publications, and see Google Scholar for the most updated list.

• LUMINA: Detecting Hallucinations in RAG System with Context–Knowledge Signals
  Samuel Yeh, Sharon Li, and Tanwi Mallick
  International Conference on Learning Representations (ICLR), 2026
• Simulating and Understanding Deceptive Behaviors in Long-Horizon Interactions
  Yang Xu, Xuanming Zhang, Samuel Yeh, Jwala Dhamala, Ousmane Dia, Rahul Gupta, and Sharon Li
  International Conference on Learning Representations (ICLR), 2026
• Clean First, Align Later: Benchmarking Preference Data Cleaning for Reliable LLM Alignment
  Samuel Yeh, Sharon Li
  Advances in Neural Information Processing Systems (NeurIPS), 2025
• HalluEntity: Benchmarking and Understanding Entity-Level Hallucination Detection
  Min-Hsuan Yeh, Max Kamachee, Seongheon Park, and Yixuan Li
  Transactions on Machine Learning Research (TMLR), 2025, J2C Certification

Education

• Ph.D. in Computer Science, University of Wisconsin-Madison
  Advisor: Prof. Sharon Li
  Sep. 2024 - Present

• M.S. in Computer Science, University of Massachusetts-Amherst
  Sep. 2022 - May 2024

• B.S. in Computer Science, National Taiwan University of Science and Technology
  Sep. 2016 - Jan. 2020

Experience

• W.J. Cody Associates, Argonne National Laboratory
  Supervisor: Dr. Tanwi Mallick, May. 2025 - Jul. 2025

• Research Assistant Intern, CrowdAI Lab, Penn State University
  Supervisor: Prof. Ting-Hao ‘Kenneth’ Huang, Jun. 2023 - Feb. 2024

• Research Assistant, NLPSA, Academia Sinica
  Supervisor: Prof. Lun-Wei Ku, May 2020 - Jul. 2022

Academic Services

Conference Reviewer

• ICLR: ‘26
• ACL: ‘24, ‘25, ‘26
• COLING: ‘24, ‘25
• AAAI: ‘22

Misc.

I am a ramen and coffee lover.

Hobbies:

• Roasting coffee
• Making pour-over coffee
• Crocheting
• Cooking
• Table tennis
• Badminton
• Maintaining my wife’s website