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
Pierre Wang will defend his thesis on Friday December 5th, 2025 at 2:00 pm in room Louis Michel.
Titre : "Perturbative and non-perturbative analysis of the renormalization group equations"
Advisor: Christoph Kopper
Time: 14 pm to 15 pm, Nov 26th, Wednesday
Location: Salle de Conférence Louis Michel
Speaker: Dionysios Anninos (King’s College London)
Title: Features of the Partition Function of a Λ > 0 Universe
Abstract: We discuss properties of the gravitational path integral for rhetorics of gravity with Lambda>0. We consider the problem in various spacetime dimensions, and for various matter fields. Time permitting, we also comment on the two-dimensional case.
1st of December at 15:00-17:00
Salle Louis Michel,
CPHT, École Polytechnique.
The seminar will include two 45-minute talks followed by a discussion:
1) Sergei Popruzhenko (NRNU Moscow Engineering Physics Institute and Prokhorov General Physics Institute RAS, Moscow, Russia)
"On the theory of collective tunnelling ionisation"
2) Arseny Mironov (CPHT)
"Applications of strong-field ionisation in ultra-high-intensity laser fields: from in situ characterisation of the laser focus to investigating fundamental strong-field QED effects."
Organizers: Arseny Mironov and Mickael Grech
November 18 (Tuesday), 14:00, Room Louis Michel (CPHT)
in the room Louis Michel (CPHT
Speaker: Álvaro Gómez León (Instituto de Física Fundamental, Madrid)
Title: Extrinsic topology in photonic lattices
Abstract: Topological phases give rise to edge states that can be used for technological applications. Among them, Floquet phases, which are obtained by periodically driving the system, have been shown to be exceptionally rich and externally tunable. In this talk, I will discuss extrinsic topology, which is a particular type of topology that emerges in Floquet systems that follow a discrete time evolution. Finally, I will show the existence of these topological phases in photonic lattices using a double fiber-ring setup and the manipulation of their edge states.
L'article « Couronne solaire : ses températures révèlent leur mystère » a été publié dans CNRS Le Journal.
Lire l'article : https://lejournal.cnrs.fr/articles/couronne-solaire-ses-temperatures-revelent-leur-mystere
Ces travaux sont publiés dans la revue The Astrophysical Journal Letters. Ils ont été conduits par des physiciens du Centre de physique théorique (CPHT, CNRS / École polytechnique), ainsi que de l’Institut d’Astrophysique Spatiale (IAS) et d’Astrophysique, Instrumentation Modélisation (AIM).
Title :Topological insulators and Local properties of orbital magnetization
Advisor : Karyn Le Hur
You can also Join the Zoom Meeting for the day
https://ecolepolytechnique.zoom.us/j/95147368458?pwd=mOFcb3bLG1z1r1gA4076sfuBfv8VWw.1
Meeting ID 951 4736 8458
Passcode: 805656
Amphi Becquerel, Great Hall of Ecole Polytechnique
Chair: Karyn Le Hur, CPHT Ecole Polytechnique and CNRS
14h30 + 5 minutes questions
Helene Bouchiat, LPS Orsay and CNRS,
Probing orbital currents in 2D materials
14h35-15h05 + 5 minutes questions
Aurélien Manchon, CINaM, Aix-Marseille university, Marseille France
Spin transport in unconventional antiferromagnets
15h10-15h40 + 5 minutes questions
Pierre Delplace, ENS Lyon and CNRS
Exceptional robustness of edge states beyond Chern insulators in non-reciprocal scattering networks
Coffee Discussion Time 15h45-16h00
Chair: Frederic Piechon, LPS Orsay
16h00-16h30 + 5 minutes questions
Jerome Cayssol (Bordeaux) and Chunxiao Liu (LPS Orsay)
Robust flat bands in honeycomb quantum wire networks
16h35-17h05 + 5 minutes questions
Jean-Eric Wegrowe, LSI Ecole Polytechnique
Phenomenological Transport: Can We Distinguish Effective vs. Real Magnetic Fields?
Our visitor Li Li (ITP Beijing) will give a seminar :
Time: 14 pm to 15 pm, Nov 5th, Wednesday
Location: Salle de Conférence Louis Michel
Title: Dancing in the dark: interior structure and dynamics for hairy black holes
Abstract:
Understanding the nature of black holes stands as a fundamental pillar of modern theoretical physics. While their external properties have been extensively mapped, the interior spacetime is an integral component of their complete causal structure. A comprehensive understanding of black holes therefore necessitates an exploration of their inner regions. In this talk, I will present our recent progress in this direction, covering the no-inner-horizon theorem, constraints on the number of horizons from energy conditions, and the rich interior dynamics of hairy black holes.
Thematic one-day workshop funded by the Partenariat Hubert-Curien *
Organisers : Adrien Fiorucci, Marios Petropoulos, Junchen Rong (CPHT)
When? November 14, 2025. From 10:00 to 17:30.
Where? CPHT, École polytechnique. Salle Louis-Michel
Also streamed on ZOOM!
Link : https://ecolepolytechnique.zoom.us/j/8929497473?pwd=dvTzQhqhDFFetUMOmQ8Zn8ZROHx4eZ.1&omn=95067817516
Meeting ID : 892 949 7473
Password : curienhub
Blagoje Oblak (ICJ, Lyon) - Quantum Geometry in Conformal Field Theory
Olga Papadoulaki (CPHT, Palaiseau) - An inflationary cosmology from Anti-de-Sitter wormhole
Simon Pekar (SISSA, Trieste) - Flat from AdS in general dimension & for any spin: the Good, the Bad & the Ugly
Konstantinos Siampos (AUTH, Thessaloniki) - The geometric origin of the energy–momentum tensor improvement terms
Matthieu Vilatte (Université de Mons) - Hypermomentum & gravitational radiation
See the detailed programme in attachment.
For any question or remark concerning this event, please send an email to
adrien.fiorucci / marios.petropoulos / junchen.rong @polytechnique.edu
* Programme financé dans le cadre du Partenariat Hubert Curien France-Grèce
Symétries asymptotiques en gravitation, théories des champs conformes et holographie
Athènes-Lyon-Paris-Thessalonique
Thematic one-day workshop funded by the Partenariat Hubert-Curien *
Organisers : Adrien Fiorucci, Marios Petropoulos, Junchen Rong (CPHT)
When? October 21, 2025. From 10:00 to 17:30.
Where? CPHT, École polytechnique. Salle Louis-Michel
Also streamed on ZOOM!
Link : https://ecolepolytechnique.zoom.us/j/8929497473?pwd=dvTzQhqhDFFetUMOmQ8Zn8ZROHx4eZ.1&omn=95067817516
Meeting ID : 892 949 7473
Password : curienhub
Mathieu Beauvillain (CPHT, Palaiseau) - Equivalence between canonical and path integral quantization for quantum mechanics on Lie groups.
Anastasios Petkou (AUTH, Thessaloniki) - TBA.
Konstantinos Sfetsos (NKUA, Athens) - Adjoint Ferromagnets.
Antoine Vincenti (ENS, Lyon) - Twisting asymptotically flat spacetimes and algebraically special solutions.
Céline Zwikel (Collège de France) - A covariant formulation of logarithmic supertranslations at spatial infinity.
See the detailed programme in attachment.
For any question or remark concerning this event, please send an email to
adrien.fiorucci / marios.petropoulos / junchen.rong @polytechnique.edu
* Programme financé dans le cadre du Partenariat Hubert Curien France-Grèce
Symétries asymptotiques en gravitation, théories des champs conformes et holographie
Athènes-Lyon-Paris-Thessalonique
