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

Come and take part in the CPHT Science Day

When : Friday, November 22, 2024

Where : Domaine de Saint-Paul, Saint-Rémy-lès-Chevreuse.

This day will be an opportunity to welcome new arrivals and present a selection of the themes studied at the CPHT.

More details : CPHT Science Day

Séminaire de Carlota Andres-Casas, 21/11/2024, 11h, au CPHT, Salle JEAN LASCOUX

Probing the Quark-Gluon Plasma with Energy Correlators

Recent advances in conformal field theory have led to the reformulation of collider jet substructure as the study of correlation functions of the energy flux, known as energy correlators, and their associated light-ray operator product expansion (OPE). Multi-point energy correlators have been measured in proton-proton collisions at the Large Hadron Collider (LHC), offering experimental validation of the light-ray OPE. In this talk, I will highlight the advantages of using energy correlators to probe the quark-gluon plasma produced in heavy-ion collisions, for which the first energy correlator measurement has recently been unveiled. Building on the unique properties of energy correlators, I will introduce a novel observable that stands as the first heavy-ion jet substructure observable where energy loss (or selection bias) is not the leading effect.

 

Mathematical physics seminar, on Monday november 18, 2024, 2 pm, in the lecture room Louis Michel at CPHT

Jürg Fröhlich (ETH Zürich)

"The stochastic evolution of isolated systems in quantum mechanics"

Abstract: In this talk I describe a Law of Dynamics for non-relativistic Quantum Mechanics (QM). The time evolution of physical systems consisting of charged matter interacting with the quantized electromagnetic field, e.g., electrons in the shell of an atom coupled to the radiation field, is non-linear, dissipative and stochastic, featuring isolated random events sometimes called “quantum jumps”. We discuss the equations describing it ! They involve a new type of stochastic process, dubbed “quantum Poisson jump process." An application to the phenomenon of fluorescence will be sketch

 

The CPHT Young Researchers Seminar will be held on Thursday the 14th of November at 14h00 in room Jean Lascoux.

Owen Colire : Elements of single-particle theory for electrons in solids

Victor Dubois : Introduction to plasma physics and magnetic confinement

The seminar will be followed by a high tea.

 

We are happy to launch a new thematic trimester on New trends in QFT, modularity and resurgence.
We will start with an in-person kick-off event on November 6, from 13:30 to 17:30, at Institut Henri Poincaré, Paris.

We are very excited about the contributions from our three speakers for this event:

Antoine Tilloy (LPENS, Mines Paris, Inria) - A variational approach to QFT in low dimensions?

Campbell Wheeler (IHES) - Matrix cocycles and Borel resummation

Claudia Rella (IHES) - The arithmetic of resurgent topological strings

To attend our kick-off event in person, there is a free but mandatory registration: https://seedseminar.apps.math.cnrs.fr/registration

We will also share a Zoom link via this mailing list for those of you who cannot make it in person.
After the kick-off event of November 6, the trimester will continue with our traditional online talks every two weeks, which will be delivered as hybrid events at the IHES (more info soon). Details will be announced via this list.
For further information: https://seedseminar.apps.math.cnrs.fr

Kind regards,
Matteo D’Achille, Aymane El Fardi, Veronica Fantini, Emmanuel Kammerer, Edoardo Lauria, Sophie Mutzel, Junchen Rong

Mailing list of the Seed Seminar of Mathematics and Physics More info at: https://seedseminar.apps.math.cnrs.fr/
 

 

A new way to assess the progress of simulation techniques in quantum physics

In an article published in the journal Science, an international collaboration involving researchers from the Centre for Theoretical Physics (CPHT) proposes a tool for estimating the difficulty of many problems yet to be solved, as well as the effectiveness of methods developed to tackle them, including quantum algorithms.

Link to scientific publication: Variational benchmarks for quantum many-body problems, Science, 386, 6719, 2024. DOI: 10.1126/science.adg9774

Read the press release from Ecole polytechnique