Cours Thématiques du CPHT

Title: An Introduction to Conformal Field Theory in 2 + 1 Dimensions

Two lectures by Junchen RONG (CPHT)

Centre de Physique Théorique, École polytechnique
Salle de conférences Louis Michel
April 7 & 11, 2025 from 11:00 to 13:00

Abstract:
In this series of lectures, I will explore conformal field theories (CFTs) in 2 + 1 dimensions and the renormalisation group flows connecting them. I will begin by examining scalar CFTs, which correspond to Wilson-Fisher fixed points in 4− ε dimensions, focusing on their stability properties from a modern perspective. Following this, I will discuss 2 + 1 dimensional gauge theories with bosonic or fermionic matter. If time permits, I will also discuss the connections between these CFTs and quantum/statistical phase transitions.

Lien zoom : https://ecolepolytechnique.zoom.us/j/7410042935

Organisers: Adrien FIORUCCI, Marios PETROPOULOS, Mikel SANCHEZ

The Collège de France Condensed Matter Physics Chair's cycle of lecturesand seminars begins on Wednesday April 30, and this year's topic is:

“Cold fermions and quantum simulation”.

Courses are in French and seminars in English.
The courses can be validated as part of the doctoral training program: register here.

Organized by: Antoine Georges (Professor, Collège de France)

Further information : here

Poster

The CPHT Young Researchers Seminar will be held on monday the 27th of March at 14h30 in room Louis Michel :

Adrien Kahn on An introduction to the variational method with neural networks

Adrien Fiorucci on A Carroll story : from heavens and back

The seminar will be followed by a high tea.

Out-of-equilibrium, Tilings & the Conformal Bootstrap

Centre de Physique Théorique, salle Louis Michel
Ecole polytechnique

— March 31, 2025 —

Accueil des participants/Café à partir de 10h00

SPEAKERS

10:30 – 11:30 Kirone Mallick (IPhT, CEA Saclay) An exact solution of the macroscopic fluctuation theory

11:30 – 11:45 Coffee break

11:45 – 12:45 Ada Altieri (MSC, Université Paris Cité) Disordered ecologicald dynamics and Moment-matching Inference for gut microbial communities

12:45 – 14:15 Lunch time at the Magnan

14:15 – 15:15 Balt Van Rees  (CPHT, Ecole polytechnique) Bootstrapping frustrated magnets

15:15 – 16:15 Grégory Schehr (LPTHE, Sorbonne Université) Universal distribution of the number of minima for random walks and Lévy flights

16:15 – 16:30 Coffee break

16:30 – 17:30 Jean-René Chazottes (CPHT, Ecole polytechnique) Thermodynamic Formalism, Symbolic Dynamics, and Quasicrystal Models

ORGANISERS
Adrien Fiorucci, Marios Petropoulos, Mikel Sanchez

Lien zoom

Programme détaillé

Poster

The CPHT Young Researchers Seminar will be held on Thursday the 30th of January at 14h30 in room Louis Michel.

Sariah Al-Saati Introduction to topology in condensed matter

Victor Franken Why do we care about black holes

The seminar will be followed by a high tea.

The CPHT Thesis Day will take place on Thursday January 23, 2025 in the Becquerel amphitheatre.

Programme of the PhD day
FY = First year

9am —> 10.30am: First session

Jean-Gabriel Thiriet will defend his thesis Wednesday, 22th of January, at 2:00 pm, in Ecole polytechnique, Amphi Becquerel.

Title : Stability of flows of interest in inertial confinement fusion: optimal perturbations

Advisor : Arnaud Couairon

PhD thesis defense 

Frederick del Pozo will defend his thesis Thursday, 5th of December, at 10h00am, in Ecole polytechnique, Amphi Gregory.
Title : Topological superconductivity in the presence of light-matter coupling and Coulomb interactions
Advisor : Karyn Le Hur
Avis de soutenance

Symposium December 5th 2024 Ecole Polytechnique, Amphi Gregory 

Organized by Karyn Le Hur, CPHT Ecole Polytechnique and CNRS
Chair: Olesia Dmytruk, CPHT Ecole Polytechnique and CNRS

“Neural networks for quantum many-body problems”
Annabelle Bohrdt, 14h00 – 14h30, University of Regensburg

"Hall response in bosonic and fermionic interacting ladders"
Roberta Citro, 14h30 – 15h00, University of Salerno

“How to recognize the anyons of the quantum Hall effect from a local measurement”
Leonardo Mazza, 15h00 – 15h30, LPTMS and University Paris-Saclay

Coffee, 15h30 – 16h00

"Connection between Quasicrystals and Quantum Hall problems"
Anuradha Jagannathan, LPS Orsay and University Paris-Saclay, 16h00 – 16h30

"Commensurate-incommensurate transitions in SU(N) AKLT chains"
Loic Herviou, CNRS and LPMMC Grenoble, 16h30-17h00

"Topological defects in spin-orbit coupling"
Andrej Mesaros, LPS Orsay and CNRS, 17h00-17h30

The string group is organising a topical day with informal blackboard presentations and discussion.

Journée Partenariat  Hubert Curien

Asymptotic Symmetries, Conformal Field Theories and Applications to Quantum Hall Effect

December 2 2024 10:30 AM at CPHT, room Jean Lascoux.

10h30-12h30 : Rodrigo Olea (Santiago), Matthieu Vilatte (Mons), Marc Geiller (Lyon)

14h-17h : Jibril Ben Achour (Lyon-Munich), Mathieu Beauvillain (Palaiseau), Blagoje Oblak ( Lyon), Simon Pekar (Trieste), Anastasios Petkou (Thessalonique)

Poster