The center for Theoretical Physics (CPHT) at Ecole Polytechnique gathers research scientists working in diverse domains of fundamental and applied Physics. The overall coherence is assured by the corpus of common, transposable, mathematical and numerical methods.
CPHT is a joint research unit of CNRS and Ecole Polytechnique, and has a partnership with the Collège de France. His director is Jean-René Chazottes, Senior Researcher at CNRS.
CPHT is on the campus of Ecole Polytechnique, buildings 5 and 6. The reception offices are located in building 6 , offices 06.1046 and 06.1045.

Postal Address :
Ecole Polytechnique 
91128 Palaiseau cedex 

Secretary phone number : 01 69 33 42 01 (from abroad: +33 169 334 201)

Write an email to someone at CPHT :  :



The 1st CPHT Young Researchers Seminar will be held on October 27, 2021 at 3:00 p.m. in the Louis Michel Conference Room with three presentations given by the following PhD students:

Majdouline Borji : Perturbative renormalization of the semi-infinite massive scalar field theory using the flow equations

Pauline Besserve : Unraveling correlated materials’ properties with noisy quantum computers

William Focillon : Potential Linear and Angular Momentum in the Scalar Diquark Model

The seminar will be followed by a high tea.



Thibaut Coudarchet will defend his Ph.D on Thursday 30th of September at 2pm. The defense will take place in "Amphi Lagarrigue".

Do not hesitate to join, simply do no forget to wear a mask.

There is also a zoom link to attend the defense online that I give you here:
30 sept. 2021 02:00 PM Paris
Zoom link:

ID: 817 8741 0532

The title of the thesis is "String theory: Supersymmetry breaking, moduli stabilization and cosmological considerations".

Jury Members

M. Hervé PARTOUCHE, École polytechnique, Directeur de thèse
Mme Mariana GRAÑA,IPhT, CEA/Saclay, Rapporteure
M. Dan ISRAËL,LPTHE, Sorbonne Université, Rapporteur
M. Ignatios ANTONIADIS, LPTHE, Sorbonne Université, Examinateur
M. Augusto SAGNOTTI, École Normale Supérieure de Pise, Examinateur
M. Jan TROOST,LPENS, École Normale Supérieure, Examinateur
M. Toumbas NICOLAOS, Département de physique, Université de Chypre, Examinateur



Philipp Klein soutiendra publiquement ses travaux de thèse le 8 septembre 2021 à 14h00 au CPHT, Salle de conférence Louis Michel.

Title: Topological proximity effect in bilayer systems and stochastic approach to interacting topological phases
Keywords: Topological phases, bilayer model, Mott physics, strongly-correlated phases 
PhD Supervisor: Karyn Le Hur, CPHT Directrice de Recherche et Professeure PCC Ecole Polytechnique

Participer à la réunion Zoom pour la soutenance de these :
ID de réunion : 884 8320 6477

Jury Members (participation via Zoom):
- Sylvain Capponi, Professeur, Toulouse, President du Jury
- Nathan Goldman, Professeur, Universite Libre de Bruxelles (reviewer)
- Mark-Oliver Goerbig, Directeur de recherches CNRS et professeur PCC Ecole Polytechnique, LPS Orsay (reviewer)
- Thierry Jolicoeur, Directeur de Recherches CNRS, CEA Saclay
- Luca Perfetti, Professeur, LSI Ecole Polytechnique
- Timan Ziman, Directeur de Recherches CNRS, Institut Laue Langevin
- Silke Biermann, Professeure Ecole Polytechnique, Invited

Charles Marteau is an alumnus of the École Normale Supérieure de Cachan. He studied theoretical physics at the master's degree of the École Normale Supérieure de Paris and fundamental mathematics at the master's degree of Sorbonne University. He joined the string theory group in fall 2017, as a PhD student under the supervision of Marios Petropoulos, on the topic Boundary structures and holographic fluids in gravity.

The arrival of Charles Marteau in the team coincided with the launching of a new research area, holographic correspondence gravity / gauge theory in asymptotically flat space-time, in which another student, Luca Ciambelli, was involved. Together, they clarified the structure underlying the fluid/gravity version of flat holography, namely Carrollian fluid dynamics, an ultra-relativistic version of hydrodynamics. Thanks to this fruitful collaboration, Charles Marteau pursued his thesis in many directions. The main advances of his work can be summarized as follows: (i) the extension of the fluid/gravity correspondence to the flat case which required the ab initio design of Carrollian hydrodynamics; (ii) an exhaustive investigation of three-dimensional gravity and its applications in two-dimensional fluids; (iii) finally the application of Carrollian concepts to the study of the black-hole horizon dynamics.

During his PhD time, Charles Marteau made several long visits abroad, in Europe and in the US, during which he developed his own collaborations with other doctoral and post-doctoral fellows. The extent of the work accomplished as well as his independence as a young researcher can be measured in his publication list: nine articles, four of which were written without his thesis director and signed with a young collaborator. His dissertation is a collection of his first seven papers, put in perspective by an introductory text which allows to set up the framework and to introduce the general notions of asymptotic symmetries and Carrollian geometry.

Charles Marteau is currently a post-doctoral researcher at the University of British Columbia in Vancouver, where he continues his activities in the group of Gordon Semenoff.



Louis Villa soutiendra publiquement ses travaux de thèse intitulés

"Out-of-equilibrium dynamics and quench spectroscopy of ultracold many-body quantum systems"

le 9 juillet 2021 à 14h00 au CPHT, Salle de conférence Louis Michel.

Thèse de doctorat de l’Institut Polytechnique de Paris préparée à l’Ecole Polytechnique, au Centre de Physique Théorique (groupe Matière condensée).

Composition du Jury :

- David Clément, Maître de Conférences, Institut d’Optique Graduate School (Laboratoire Charles Fabry), Rapporteur
- Nicolas Pavloff, Professeur, Université Paris-Saclay (Laboratoire de Physique Théorique et Modèles Statistiques), Rapporteur
- Gabriele De Chiara, Reader, Queen’s University of Belfast (Centre for Theoretical Atomic, Molecular and Optical Physics), Examinateur
- Luca Tagliacozzo, Ramon y Cajal Fellow, Universitat de Barcelona (Departamento de Fisica Cuantica i Astrofisica), Examinateur
- Patrizia Vignolo, Professeure, Université de Nice-Sophia Antipolis (Institut Non-Linéaire de Nice), Examinatrice
- Laurent Sanchez-Palencia, Directeur de recherche, Ecole Polytechnique (Centre de Physique Théorique), Directeur de thèse

Résumé de la thèse / Abstract



La « Nuit des Temps » est une manifestation grand public organisée conjointement par la Société Française de Physique, le CNRS et le CEA et en partenariat avec la Société Française d’Optique, la Société Chimique de France et la revue "Sciences & Avenir".

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