About Me

I am a postdoc at Ghent University, in the Algebra group led by Tom De Medts, and part of the EOS project “High-dimensional expanders and Kac-Moody-Steinberg groups” (in collaboration with Timothée Marquis and Pierre-Emmanuel Caprace from UCLouvain). I am also collaborateur scientifique at the ULB in the cryptography group (department of computer science).

Previously, I was an Instructor in Mathematics at Brandeis University and a Zuckerman postdoctoral fellow at the Einstein Institute of Mathematics of the Hebrew University of Jerusalem, hosted by Elon Lindenstrauss.

I received my Ph.D. in Mathematics from Yale University in 2019, advised by Gregory Margulis (Yale) and Emmanuel Breuillard (Cambridge).

Research Interests

Arithmetic groups and algebraic groups, locally symmetric spaces, number theory, harmonic analysis, representation theory, cryptography (lattices and isogenies), quantum computing.

Research Publications

• Another Look at the Quantum Security of the Vectorization Problem with Shifted Inputs, with P. Frixons, V. Gilchrist, P. Kutas, S.-P. Merz, C. Petit. To appear at EUROCRYPT 2026 (eprint).
• Bottom of the Length Spectrum of Arithmetic Orbifolds, with Mikolaj Fraczyk. Transactions of the AMS (2023) (journal, ArXiV)
• Uniform Kazhdan Constants and Paradoxes of the Affine Plane. Transformation Groups (2022) (journal, arXiv)
• Arithmetic Groups and the Lehmer Conjecture, with François Thilmany. Israel Journal of Mathematics (2021) (journal, arXiv)
• Logarithmic diameter bounds for some Cayley graphs, with Xin Zhang. J. Group Theory (2022) (journal)

Other works

I translated A. Borel’s 1969 book “Introduction aux groupes arithmétiques” (Hermann-Paris) to English, published by the AMS (University Lecture Series 73) in 2019.

Current Teaching

In Spring 2026, E. Leibtag and I are teaching a course titled “Advanced topics in group theory”. The topic is “expansion in finite simple groups of Lie type”.