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Email: tharis at bu.edu

Hi! I’m Themis!

I am a third-year PhD student at Boston University, jointly advised by ***Krzysztof Onak*** and Venkatesh Saligrama. I did my undergrad at Dartmouth College advised by **Amit Chakrabarti.**

My research focuses on developing efficient and robust algorithms for Foundation Models. I am also interested in problems from different areas of theoretical computer science, including sublinear algorithms, learning theory and complexity.

Work Experience

• Research Intern, Google Research, AIRX Team (2026)
• Student Researcher, Google Research, hosted by **Maryam Karimzadehgan** (2025-2026)
• Research Intern, National Institute of Informatics, Tokyo, hosted by **Yuichi Yoshida** (2025)
• Software engineer, Windows Base Kernel Team, Microsoft (2021-2023)
• Software engineering intern, Windows Base Kernel Team, Microsoft (2020)

Publications

Foundation Models

Work on (mostly) Transformer models, efficient inference and intepretability.

1. Layerwise Dynamics for In-Context Classification in Transformers: Lutz, Haris, Chandra, Gangrade, Saligrama — ICML 2026 (Spotlight)
2. Noise Stability of Transformer Models: Haris, Zhang, Yoshida — ICLR 2026
3. Compression Barriers for Autoregressive Transformers: Haris, Onak — COLT 2025
4. $k$NN Attention Demystified: A Theoretical Exploration for Scalable Transformers: Haris — ICLR 2025
   • Poster Page

Theoretical Computer Science

Work mainly focused on sublinear algorithms for various TCS problems.

Submodular Functions