ICFP seminar Program

Diploma(s)
Place
ENS-PSL
Automne - Hiver
Level Diplôme ENS Master 1 3 ECTS - En anglais
Instructor(s) Christina PSAROUDAKI
Contact - Secrétariat de l’enseignement

Tél : 01 44 32 35 60
enseignement@phys.ens.fr

The seminar takes place on Wednesdays at 1:30pm in the lecture room Conf IV room. It is held in alternation with the physics department’s colloquium. The list is updated often. 

 

Program 2024/2025

Sept 25th: Lucas Pinol, LPENS. 

Title: Cosmological Collider Physics
Abstract: Cosmic inflation is the current paradigm for describing the earliest epoch of our universe. While the main idea is now well verified, the exact mechanism responsible for this accelerated expansion remains to be found. What was the particle content during inflation? This is one of the most exciting research directions that theoretical cosmologists are striving to follow. I will present promising results from the last decade that strengthen the links between cosmology, particle physics and high-energy theories, a program known as “cosmological collider” studies.


Oct 2nd: Francois Parmentier, SPEC

Title: Quantum Transport of Heat In Graphene

Abstract: The quantum Hall effect is one of the most fascinating phenomena of modern quantum physics, where a two-dimensional gas of electrons under a high magnetic field becomes electrically insulating, with the electric current only being carried at the edges of the sample. This edge conduction is the seat of many signatures of quantum physics, in particular the quantization of the electrical resistance, allowing a metrological definition of the Ohm using only fundamental constants. In this presentation, I will introduce the basics of quantized electronic transport, and give a wide overview of the field of mesoscopic physics in the quantum Hall effect regime. I will then focus on the thermal properties of the quantum Hall effect, in particular the quantization of heat flow on the edge.  I will introduce the principle of our heat transport measurements, and describe recent results on the thermal transport properties of the unusual insulating state emerging at zero energy in graphene under a high magnetic field.

Oct 9th: Simona Mei, APC

Title: Clusters and protoclusters at z>1.5: galaxy quenching and morphological transformations, gas content and detection challenges

Abstract: We will introduce the importance and the challenges of detecting and studying clusters and protoclusters at z>1.5. In particular, we will focus on results obtained on a sample of clusters and protoclusters detected by the Cluster Around Radio Loud AGN survey (CARLA), and discuss their implication for future surveys with combined observations from Euclid and LSST. The analysis of CARLA spectroscopically confirmed clusters at 1.3<z<2.8 shows that the morphology-density and passivity-density relations are already in place at z~2, with high fractions of ETG observed at z~3. We observe large percentages of active ETG at z~2, and mergers and asymmetry are significantly higher in these clusters compared to the field. We will discuss the molecular and hot gas content of some clusters in our sample. Finally, we will present recent predictions for Euclid detections using semi-analytical and empirical models.
 

Oct 23rd: Marylou Gabrié, LPENS

Title: Assisting sampling of physical systems with generative models

Abstract: Deep generative models parametrize very flexible families of distributions able to fit complicated datasets of images or text. These models provide independent samples from complex high-distributions at negligible costs. On the other hand, sampling exactly a target distribution, such as the Boltzmann distribution of a physical system, is typically challenging: either because of dimensionality, multi-modality, ill-conditioning, or a combination of the previous. In this talk, I will discuss opportunities and challenges in enhancing traditional Monte Carlo methods with learning.
 


Nov 20th: Ramiro Godoy Diana, PMMH

Title: Collective fish swimming and swimmer interactions

Abstract: I will discuss our recent work using laboratory experiments with live fish to study the problem of collective fish swimming from different perspectives. In the first part I will discuss the case of interactions between a pair of neighbouring fish as the basic building block of a group of swimmers, using data from a forced flow swimming channel. In addition to experiments with live fish, I will present our efforts with robotic models and numerical simulations to gain some insight into the physical mechanisms at play in such a minimal fish school. In the second part, I will discuss our results from another type of experimental setup: a free-swimming arena.  We experimentally studied the group dynamics of a large population of fish swimming in shallow water in a rectangular tank.


Dec 11th: Sylvain Gigan, LKB 

Dec 18th: Jean Comtet, ESPCI

Jan 8th: Sandrine Leveque Fort , ISMO

Program 2023/2024

September 27 : Kallia Petraki

Sorbonne University and LPENS
Our Socratic Universe

October 4 : Thomas Gregor

Institut Pasteur and Princeton University
Information flow in living embryos : insights from the stochastic motion of active DNA loci
The seminar will take place at the Montrouge campus, Room 305

October 18 : Zaki Leghtas

LPENS

Quantum information processing with superconducting circuits

November 8 : Remi Monasson

LPENS

November 22 : Daniele Steer

University Paris Diderot, Laboratoire APC (Astro-Particules et Cosmologie)

December 13 : Julien Laurat

Laboratoire Kastler Brossel, Université P. et M. Curie

January 10 : Clément Sayrin

Laboratoire Kastler Brossel
Quantum simulation with circular Rydberg atoms


February 14 : Pauline Yzombard 

Laboratoire Kastler Brossel Jussieu

L'antimatière au CERN : tests des interactions fondamentales

February 28 : Emmanuel Baudin 

LPENS

Comment explorer la conversion énergie-matière avec un simple transistor et un ampèremètre ?
 

13 mars : Présentations de projets du tournoi de physique.