Xavier Waintal
Director of Research at CEA Grenoble · PHELIQS, Université Grenoble Alpes
I am a theoretical physicist working at the border between theory and numerics. My colleagues and I study quantum nanoelectronics, out-of-equilibrium quantum many-body physics and quantum computing, and we like to build numerical tools (often open source) that follow closely what one would do with pen and paper.
Research More about our research →
Tensor networks and quantics
Compressing functions of many variables to solve problems that look exponentially hard.
What can quantum computers really do?
Simulating quantum computers, and asking which problems genuinely need one.
Out-of-equilibrium many-body physics
Summing Feynman diagrams to high orders to solve strongly interacting systems driven out of equilibrium.
Time-resolved quantum nanoelectronics
Following electrons in time in quantum devices, often together with experiments.
Recent papers All 129 publications →
- A fidelity metric for quantum annealing benchmarked by extreme scaling quantum Monte-Carlo simulationsGabriel Gouraud, Miha Srdinšek, and Xavier Waintal
- Replica Tensor TrainMiha Srdinšek, Gabriel Gouraud, and Xavier Waintal
- A multilevel tensor network compression technique for simulating Lindblad dynamics in superconducting circuitsAdrien Moulinas and Xavier Waintal
- Who can compete with quantum computers? Lecture notes on quantum inspired tensor networks computational techniquesXavier Waintal, Chen-How Huang, and Christoph W. Groth
- Solving the Gross-Pitaevskii equation on multiple different scales using the quantics tensor train representationMarcel Niedermeier, Adrien Moulinas, Thibaud Louvet, Jose L. Lado, and Xavier Waintal
Blog All posts →
- September 2026A new website
This site replaces my old CEA page.
Talks and videos All talks →
PhD, postdoc and internship positions
I welcome applications at any time from students and postdocs who like theoretical physics and numerics.