About me

I'm a researcher in quantum computing. Starting in fall 2026, I will be a postdoctoral researcher at the Simons Institute for the Theory of Computing at UC Berkeley, hosted by Prof. Umesh Vazirani. My research interests include quantum complexity theory, quantum algorithms, fault-tolerant quantum computation, and their intersections.

Previously, I received my PhD from Harvard University in 2026, where I worked with Prof. Anurag Anshu and was affiliated with the Harvard Quantum Initiative and the Theory of Computation group, and supported by an IBM PhD Fellowship. I also made many extended visits to the Simons Institute during my PhD. Before Harvard, I received my bachelors degrees in physics and computer science from MIT in 2022.

Contact: thequynhqb at pm dot me, or 𝕏 @nguyenquantum.

Selected works

(See my Google Scholar for full list)

A distillation–teleportation protocol for fault-tolerant QRAM, with Alex M. Dalzell, Andras Gilyén, Connor T. Hann, Sam McArdle, Grant Salton, Aleksander Kubica, Fernando Brandao

arxiv:2505.20265, FOCS 2025, QIP 2026

Learning quantum Gibbs states locally and efficiently, with Chi-Fang (Anthony) Chen, Anurag Anshu

arxiv:2504.02706, FOCS 2025, QIP 2026

Quantum fault tolerance with constant-space and logarithmic-time overheads, with Christopher A. Pattison

arxiv:2411.03632, QIP 2025 & STOC 2025 & QEC 2025

On the complexity of unique quantum witnesses and quantum approximate counting, with Anurag Anshu, Jonas Haferkamp, Yeongwoo Hwang

arxiv:2410.23811, ITCS 2026 & TQC 2026

Good binary quantum codes with transversal CCZ gate

arxiv:2408.10140, QIP2025 (Long plenary talk & Best student paper award) & STOC 2025

The mixed Schur transform: efficient quantum circuit and applications

arxiv:2310.01613, QIP 2024

Circuit-to-Hamiltonian from tensor networks and fault tolerance, with Anurag Anshu and Nikolas P. Breuckmann

arxiv:2309.16475, QIP 2024 & STOC 2024

Updates

[July 2026] I'm spending this summer at Google Quantum AI.
[June 2026] I enjoyed 5 months visiting the Simons Institute.
[October 2025] I served as a program committee member for the QIP 2026 conference.
[July 2025] I enjoyed 2 months visiting the Simons Institute.
[March 2025] I served as a program committee member for the QEC 2025 conference.
[August 2024] I enjoyed 3 months interning at the AWS Center for Quantum Computing.
[August 2024] I created this new webpage. My old webpage from 2021 is here.
[May 2024] I enjoyed 3 months visiting the Simons Institute at UC Berkeley, where I was participating in the Spring 2024 quantum program.

Personal

I grew up in Quang Binh Province in Central Vietnam, where opportunities to engage with science can be limited. This experience has made me care deeply about expanding access to science education for students from similar backgrounds. I co-founded and co-lead SEAS — Summer in Engineering and Applied Sciences, a nonprofit initiative dedicated to advancing STEM education in Central Vietnam. Each year, we bring together around 40 motivated students from underserved regions for a free summer program, introducing them to modern topics in science and engineering and mentoring them through hands-on projects. Please feel free to reach out if you’re interested in our work or would like to get involved.

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