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 :
CPHT
Ecole Polytechnique
91128 Palaiseau cedex
France
Secretary phone number : 01 69 33 42 01 (from abroad: +33 169 334 201)
Write an email to someone at CPHT : : firstname.lastname@polytechnique.edu
The 17th CPHT Young Researchers Seminar will be held on Thursday 23th November at 15h00 in Louis Michel conference room.
Our two speakers are coming from outside our lab this time again !!
Josh O'Connor (Université de Mons, Belgium): Hidden symmetries and dual field theories.
Tom Wetzstein (LPTHE Jussieu, Paris): Anomalous BMS symmetry.
The seminar will be followed by a high tea.
La Journée des Thèses du CPHT a lieu à l'amphi Cauchy le vendredi 17 novembre 2021.
The 16th CPHT Young Researchers Seminar will be held Monday 13th November at 15h00 in Jean Lascoux conference room.
Our two speakers are coming from out side our lab this time !!
Ismael Ahlouche (Mons University, Belgium): A geometric point of view on Wigner's classification
Nehal Mittal (Collège de France): Identifying topological phases: verification of bulk-edge correspondence
The seminar will be followed by a high tea.
The 15th CPHT Young Researchers Seminar will be held on November 9th, 2023 at 3:00 p.m. in the Louis Michel Conference Room with two presentations :
Pierre Wang: Analysis of the $\varphi^4_4$-theory with N components using the flow equations
Victor Dubois: Producing energy with nuclear reactions : focus on the fusion-fission hybrid reactor
The seminar will be followed by a high tea.
The 14th CPHT Young Researchers Seminar will be held on Friday the 20nd of October at 15h00 in Salle de conférence Louis Michel:
David Rivera Betancour : "Carrollian perspective of Ricci-flat spacetimes"
David Ramirez : "Chaos and hydrodynamics in 2D CFTs"
The seminar will be followed by a high tea.
Filippo Sottovia soutiendra publiquement ses travaux de thèse le 7 novembre 2023 à 14h00 au CPHT dans la salle de conférence Louis Michel
Titre : Revisiting the Landau criterion: a hydrodynamic and holographic approach to superfluid instabilities
Directeur de thèse: Blaise Goutéraux
La soutenance sera suivi du pot de thèse.
Majdouline Borji soutiendra publiquement ses travaux de thèse le 24 octobre 2023 à 14h00 au CPHT
Titre : Renormalization of QFTs which are not translation invariant
Directeur de thèse: Christoph Kopper
La soutenance sera suivi du pot de thèse dans la salle Jean Lascoux au CPHT.
Tuesday, March 12 at 14:30
at CPHT, Conference room Louis Michel
Eleanor Crane (MIT, USA)
Advantages of Digital Qubit-Boson Hardware for Quantum Simulation
Abstract: Finding a straightforward, scalable and universal framework for quantum simulation of strongly correlated fermions and bosons is important from material science to high-energy physics. Here, we develop hybrid qubit-oscillator operations for microwave cavities coupled to transmon qubits required for implementing dynamics of bosonic matter, fermionic matter, and Abelian gauge fields in (2+1)D. We then expand the method to ground state preparation and propose measurement of various long-range correlation functions required for the study of phase transitions. We implement numerical proof of principle experiments for a (1+1)D Z2 Bose Hubbard (BH) gauge theory and the U(1) Schwinger model. We include the main sources of hardware noise, which we mitigate through post-selection based on Gauss' law. This new approach motivates us to uncover the phase diagram of the Z2 BH model, relevant to the Higgs sector. We discover a new phase of matter which exhibits strong density fluctuations which we dub the `clump' phase. Finally, we perform a complexity analysis and find that for one Trotter step of these example models, qubit systems require higher gate counts than our proposal by three orders of magnitude. Our correspondingly higher circuit fidelities may help us to successfully capture the essential physics of these theories in the near-term.
Le CMAP, le CMLS et le CPHT organisent des journées thématiques dont l'audience visée est un large public de mathématicien-ne-s et de physicien-ne-s. La prochaine journée aura pour thème l'écologie, thème qui sera abordé sous différents points de vue par :
Ada Altieri (Laboratoire Matière et Systèmes Complexes, Université Paris Cité)
Guy Bunin (Physics departement, Technion)
Olivier Hénard (LMO, université Paris-Saclay)
Gaël Raoul (CMAP, CNRS, école polytechnique)
Cette journée aura lieu le 15 novembre 2023 de 10h30 à 16h15.
Plus d'informations sont disponibles à l'adresse suivante :
https://indico.math.cnrs.fr/e/themaEcologie15nov2023
Pour des raisons logistiques, l'inscription est gratuite mais obligatoire. Elle s'effectue à l'adresse suivante :
https://indico.math.cnrs.fr/event/10692/registrations/975/
En espérant vous y voir nombreux et nombreuses,
Pour l'organisation, Anne-Sophie de Suzzoni Jean-René Chazottes Anne de Bouard Cécile Huneau
Conférence grand public à l'occasion de la fête de la science
Samedi 14 octobre 2023 à 15h15
Amphithéâtre Becquerel
Tout est quantique !
par Laurent Sanchez-Palencia
La physique quantique a révolutionné notre compréhension du monde à l’échelle atomique et au-delà. Venez en découvrir les mystères, mais également comment elle a envahi les technologies du quotidien et ses promesses pour une nouvelle révolution technologique.