Le Centre de Physique Théorique (CPHT) réunit des chercheurs dont les activités couvrent un large spectre de la Physique, tant dans ses aspects fondamentaux qu'appliqués.
Le CPHT est une unité mixte de recherche (UMR 7644) du Centre National de la Recherche Scientifique (CNRS) et de l’Ecole polytechnique. Au niveau du CNRS, il est rattaché à l’Institut de physique. Le CPHT a également un partenariat avec le Collège de France.
Le CPHT, dirigé par Jean-René Chazottes, directeur de Recherche au CNRS, est implanté sur le campus de l’Ecole Polytechnique à Palaiseau, dans le bâtiment 6 et dans l'aile 0 du bâtiment 5. Le secrétariat se situe dans le Bâtiment 6, bureaux 06.1046 et 06.1045. 
 

Adresse postale : 
CPHT 
Ecole Polytechnique 
91128 Palaiseau cedex 
France

Tél. Secrétariat : 01 69 33 42 01

Pour écrire un email à un membre du laboratoire : prenom.nom@polytechnique.edu

 

Prix de thèse de l’Université d'Heidelberg pour Sabine Harribey

Depuis 2019 le département de physique et astronomie de l’université de Heidelberg décerne annuellement deux prix de thèse, parrainés par la fondation Wilhelm et Else Heraeus.

Sabine Harribey est l'un des lauréats 2022 pour son travail intitulé "Renormalization in tensor field theory and the melonic fixed point" et réalisé conjointement à l'École polytechnique (CPHT) et à Heidelberg, sous la direction de D. Benedetti et R. Gurau.

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Séminaires des jeunes chercheurs du CPHT

Le 7ème séminaire des jeunes chercheurs du CPHT aura lieu le 27 janvier 2023 à 15h00 à la Salle de conférence Louis Michel avec deux présentations :

Frederick del Pozo (CPHT, CNRS, École Polytechnique) : Fractional topology and Majoranas in 1D Superconductors 

Dawei Shen (LJLL, CNRS, Sorbonne Université) : Feynman propagator on asymptotically Minkowski spacetimes

Le séminaire sera suivi d'une goûter.

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Friedmann Colloquium of the Physics Department : December 5, 2022 6:00 pm - Frank EISENHAUER

 

The publication of Alexander Friedmann's seminal papers in 1922 marked the birth of modern cosmology. In order to celebrate its centenary, the Friedmann Endowment will fund various scientific actions over the next few years, covering the wide range of themes associated with cosmology, at École Polytechnique and partner institutions, in collaboration with the Foundation of Ecole Polytechnique. The Friedmann Colloquium will be a flag activity, organized by the Physics Department and aimed at a general audience of scientists and science students.

For its first edition of the Friedmann Colloquium, Dr. Frank Eisenhauer from the Max Planck Institute for Extraterrestrial Physics, Munich (Garching) will speak about : THE GALACTIC CENTER BLACK HOLE, THE EFFECTS OF GENERAL RELATIVITY, AND HOW TO OBSERVE THEM

Monday, December 5, 2022 at 6:00 pm in Becquerel Lecture Hall of Ecole polytechnique

Abstract found at : https://gargantua.polytechnique.fr:443/siatel-web/app/linkto/mICYYYS0mYK

The program and the videos of the conferences of the Physics Department are available on the Department website: https://portail.polytechnique.edu/physique/fr/seminaire-de-physique

About the Alexander Friedmann Endowment
In 1922 Alexander Friedmann (1888-1925) published a seminal paper, which triggered the advent of modern cosmology. In order to celebrate its centenary, the Alexander Friedmann Endowment supports various scientific activities, covering the wide range of subjects associated with cosmology, at Ecole Polytechnique and its partner institutions. Among these activities, the Friedmann Colloquium is a general seminar addressing an audience of scientists and science students.
Scientific committee : Silke Biermann (CPHT), Jean-René Chazottes (CPHT), Mathieu de Naurois (LLR), Marios Petropoulos (CPHT), Sébastien Renaux-Petel (IAP), Yves Sirois (LLR).

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Journée des thèses du CPHT le vendredi 25 novembre 2022

 

La Journée des Thèses du CPHT a lieu à l'amphi Becquerel dans le grand hall le vendredi 25 novembre 2022.

Programme

9h15 - 10h45

1-Jean-Gabriel Thiriet (Stability analysis of ablation flows in inertial-confinement fusion: receptivity)
2-Adrien Loty (Unitarity constraints on maximally supersymmetric string theories)
3-Theophile Truchis (Metastability and state clustering in evolutionary games)
4-Zhaoxuan Zhu (Thermodynamic phase diagram of two-dimensional bosons in a quasicrystal potential)
5-Matthieu Vilatte (A dive into the Carrollian world)
6-Majdouline Borji (Perturbative renormalization of boundary field theory)
7-Victor Franken (Entanglement builds bridges (in quantum gravity)

11h15 - 12h30

8-Ephraim  Bernhardt (Topology of spin-1/2 systems and relations to a « quantum dynamo)
9-Dylan Bansard-Tresse (Extreme value laws and hitting times for dynamical systems)
10-David Rivera Betancour (Carrollian perspective of fluids and holography)
11-Frederick del Pozo (Fractional topology in one-dimensional interacting superconductors)
12-Pauline Besserve (Selected aspects of quantum algorithmics for the quantum many-body problem in the noisy era)
13-Mathieu Beauvillain (Non-linear edge dynamics for quantum-hall droplets)

14h45 - 16h15

14-Mohamed Rekhis (Toroidally-induced Alfven eigenmode (TAE) destabalization by energetic particles in tokamak plasmas)
15-Erik Linner (Multi-channel fluctuating field approach to competing instabilities in interacting electronic systems)
16-Sariah Al Saati (Topological Nodal Ring Semimetal in Graphene)
17-Gabriele Casagrande (Minimal supergravity models for inflation)
18-Anustrup Mukerjee (Search for novel transition metal chalcogenides for thermoelectric applications)
19-Liam Rampon (Exploring strongly correlated condensed matter using numerical methods)
20-Pierre Wang (Triviality of phi-4 theory in the mean field approximation)

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Soutenance de thèse de James Boust

 

James Boust soutiendra publiquement ses travaux de thèse le 18 novembre 2022 au CPHT dans la salle de conférence Louis Michel.

Titre de la thèse : Propriétés magnétiques et optiques de composés de terres rares corrélés à partir des premiers principes 

Membres du Jury :
Alexander Lichtenstein (Universität Hamburg)
Markus Aichhorn (Graz University of Technology)
Silke Biermann (Ecole polytechnique)
Nora Dempsey (Institut Néel CNRS)
Olle Eriksson (Uppsala University)
Cesare Franchini (Universität Wien)

Abstract: In so-called "strongly correlated" materials, the strong Coulomb interaction which correlates the movement of electrons at the atomic scale can give rise to outstanding properties at the macroscopic scale. The materials studied in this thesis contain rare-earth elements (like neodymium) which usually exhibit these strong correlation effects. Due to their remarkable properties, rare-earth compounds have numerous technological applications; they are for instance used as high-performance magnets in electric motors. The demand for rare earths is therefore increasing; on the other hand, mining them is difficult, expensive and polluting. Hence, optimizing the properties and composition of rare-earth-based materials can be of great technological, economical and environmental interest. From the point of view of theoretical physics, describing these materials constitutes a real challenge, precisely due to their strongly correlated nature. In this thesis, we develop theoretical approaches to study the magnetic and optical properties of rare-earth compounds, notably the industrially relevant neodymium magnet. These theoretical methods are said to be from "first principles" as they are based on the fundamental laws governing the physics at the atomic level.

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