About Me

I am a postdoctoral researcher in cryptography at ULB (Université Libre de Bruxelles) supervised by Christophe Petit.

Previously, I was a postdoc in mathematics 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), 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 advised by Gregory Margulis (Yale) and Emmanuel Breuillard (Cambridge).

Research Interests

Various areas of post-quantum cryptography, quantum computing, arithmetic groups and algebraic groups, locally symmetric spaces, number theory, harmonic analysis, representation theory.

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. EUROCRYPT 2026 (proceedings, 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”.