Thierry Lévy
Professor at the LPSM (Laboratoire de Probabilités, Statistique et Modélisation), at Sorbonne Université
Member of the Dynamics, probability, geometry team
Mail : firstname.lastname@sorbonne-universite.fr
Postal address : Sorbonne Université, LPSM – 4, place Jussieu – F-75005 Paris
Office : 16-26 120
Teaching
In Master 1 : Probabilités approfondies – UE MU4MA011
In Master 2 : Convergence de mesures, Grandes déviations, Percolation (CGP)
I am deputy director of the Master of mathematics, in charge of the M1.
Research
Research topics
My work is related, more or less directly, to the probabilistic study of gauge theories, on a two-dimensional Euclidean space-time or on graphs. I have studied the Yang-Mills measure on surfaces, its semi-classical limit, its “large N” limit. In the last few years, I have been interested in the geometry and statistical physics of graphs with a vector bundle and a connection.
In my work, I use parts of the differential geometry of principal bundles, the representation theory of classical compact Lie groups and symmetric groups, the theory of large random matrices, non-commutative probability, in particular free probability, the theory of determinantal point processes. I have occasionally used potential theory in the complex plane and large deviations.
Among the things I have not yet worked with, I am particularly interested in Chern–Simons theory and the Wess–Zumino–Witten model, quantum deformations of the Yang–Mills measure, the theory of regularity structures.
Prepublications
- On the mean projection theorem for determinantal point processes, avec Adrien Kassel. [ arXiv:2203.04628 ]
Publications
- Determinantal probability measures on Grassmannians. To appear in Ann. Inst. Henri Poincaré D, avec Adrien Kassel. [ arXiv:1910.06312 ]
- Covariant Symanzik identities. Probability and Mathematical Physics, 2 (2021) no. 3, 419–475, avec Adrien Kassel.
- Two-dimensional quantum Yang–Mills theory and the Makeenko–Migdal equations. Frontiers in analysis and probability, 275–325, Springer (2020). [ arXiv:1912.06246 ]
- A colourful path to matrix-tree theorems. Algebraic Combinatorics, 3 (2020), no. 2, 471–482 , avec Adrien Kassel. [ arXiv:1903.02491 ]
- Four chapters on low-dimensional gauge theories. Stochastic geometric mechanics, Springer Proc. Math. Stat. 202 (2017), 115–167, avec Ambar N. Sengupta.
- The master field on the plane. Astérisque, 388 (2017). [ arXiv:1112.2452 ]
- The number of prefixes of minimal factorisations of a cycle. Electron. J. Combin, 23 (2016) no. 3.
- On The Douglas–Kazakov phase transition. ESAIM: Proc., 51 (2015), avec Mylène Maïda.
- Topological quantum field theories and Markovian random fields. Bull. Sci. Math., 135 (2011) no. 6-7, 629–649.
- A continuous semigroup of notions of independence between the classical and the free one. Ann. Prob., 39 (2011) no. 3, 904–938, avec Florent Benaych-Georges. [ arXiv:0811.2335 ]
- Central limit theorem for the heat kernel measure on the unitary group. J. Funct. Anal, 259 (2010) no. 12, 3163–3204, avec Mylène Maïda. [ arXiv:0905.3282 ]
- Two-dimensional Markovian holonomy fields. Astérisque, 329 (2010). [ arXiv:0804.2230 ]
- Schur–Weyl duality and the heat kernel measure on the unitary group. Adv. Math., 218 (2008) no. 2, 537–575. [ arXiv:math/0703690 ]
- Differential equations driven by rough paths, Lecture Notes in Mathematics Vol. 1908. Notes du cours de Terry J. Lyons à l'école d'été de Saint-Flour en 2004. Rédigées avec Michael J. Caruana.
- Large deviations for the two-dimensional Yang–Mills measure, Actes de la conférence Stochastic Analysis in Mathematical Physics (Lisbonne 2006). World Scientific.
- Discrete and continuous Yang–Mills measure for non-trivial bundles over compact surfaces. Probab. Theory Related Fields, 136 (2006) no. 2, 171–202. [ arXiv:math-ph/0501014 ]
- Large deviations for the Yang–Mills measure on a compact surface. Comm. Math. Phys., 261 (2006) no. 2, 405–450, avec James R. Norris. [ arXiv:math-ph/0406027 ]
- Wilson loops in the light of spin networks. J. Geom. Phys., 52 (2004) no. 4, 382–397. [ arXiv:math-ph/0306059 ]
- Yang–Mills measure on compact surfaces. Mem. Amer. Math. Soc., 166 (2003) no. 790, xiv+122 pp. [ arXiv:math/0101239 ]
- Comment choisir une connexion au hasard ? Séminaire de Théorie Spectrale et Géométrie Vol. 21 (2002–2003), 61–73. Accès au texte.
- Construction et étude à l'échelle microscopique de la mesure de Yang–Mills sur les surfaces compactes. C. R. Math. Acad. Sci. Paris, 330 (2000) no. 11.