Département de Physique de l'Ecole Normale supérieure

How personalised is our immune repertoire ?

Colloquium — 2022-03-31T13:13:55Z

Aleksandra Walczak,
LPENS - CNRS
Tuesday, April 19, 2022
5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
Immune repertoires provide a unique fingerprint reflecting the immune history of individuals, with potential applications in precision medicine. Can this information be used to identify a person uniquely ? If it really is a personalised medical record, can it inform us about the outcomes of a COVID-19 infection ? I will explore how learning about randomness can help us read this (...)

- Colloquium 2021-2022

Propagation and stabilization in time-varying media

Colloquium — 2022-03-08T15:28:31Z

Emmanuel Fort, Institut Langevin, ESPCI Paris - PSL
Tuesday, March 29, 2022 5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
The introduction of the concept of time crystal in 2013 by the Nobel Prize winner, Frank Wilczek, has prompted the emergence of a new and fast-growing field of research focused on time-varying materials. In such media, the wave velocity can be varied through the entire medium in times that are short in comparison to the wave period. These media provide new (...)

- Colloquium 2021-2022

Probing the First Galaxies and Cosmic Reionization with the James Webb Space Telescope - Hakim Atek

Colloquium — 2022-02-09T14:07:22Z

Hakim Atek, Institut d'Astrophysqiue de Paris
Tuesday, March 01, 2022 5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
The role of dwarf galaxies in the star formation history of the universe has long been overlooked, primarily because of observational challenges and the predominance of bright, photometrically-selected galaxy samples. For instance, the luminosity function (which indicates the prevalence of galaxies as a function of their luminosity) at high redshift indicates that dwarf (...)

- Colloquium 2021-2022

Ground based gravitational-wave astronomy in the next decades - Matteo Barsuglia

Colloquium — 2022-01-27T08:25:50Z

Matteo Barsuglia, Laboratoire Astroparticule et Cosmologie, CNRS
Tuesday, February 8, 2022 5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
After the first gravitational wave detection in 2015 and the GW170817 multi-messenger observation, the gravitational-wave astronomy has evolved rapidly. LIGO and Virgo detectors have performed their 3rd observing run between April 2019 and March 2020 and the third catalog of gravitational-waves sources (GWTC-3) has just been released, with a total (...)

- Colloquium 2021-2022

The spin glass cornucopia revisited - Marc Mézard

Colloquium — 2022-01-12T09:27:53Z

Marc Mézard,
LPENS, CNRS
Tuesday, January 18, 2022
5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
Spin glasses are useless. Yet their study, triggered by pure intellectual interest, has created a formidable new branch of statistical physics distinguished this year by the Nobel prize attributed to Giorgio Parisi. Several decades after being deciphered, the spin glass mystery has found applications in many other fields, from protein folding to computational neurosciences, information (...)

- Colloquium 2021-2022

Twenty years of mesoscopic physics at ENS

Colloquium — 2022-01-05T09:28:30Z

Bernard Plaçais,
LPENS, CNRS
Tuesday, January 11, 2022
5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
Mesoscopic physics was a mature field when it was introduced at ENS twenty years ago. Originally focussed on dynamical quantum transport and noise in ballistic model systems such as carbon nanotubes and quantum Hall conductors, the activity has developped into new routes including electron quantum optics, quantum electrodynamics of mesoscopic circuits, quantum technologies, topological (...)

- Colloquium 2021-2022

New Properties of Matter in the Strong Coupling Regime

Colloquium — 2021-12-03T10:54:40Z

Thomas Ebbesen,
USIAS & ISIS, University of Strasbourg & CNRS, France
Tuesday, December 07, 2021
5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
Light-matter strong coupling can give rise to a multitude of physical effects through the formation of hybrid light-matter states that have been extensively studied. However, the implications for molecular and material properties have remained mostly unexplored. After introducing the fundamental concepts, examples of modified (...)

- Colloquium 2021-2022

Scale invariance for quantum fluids : solitons and breathers in a 2D gas

Colloquium — 2021-11-29T15:18:04Z

Jean Dalibard,
Collège de France, Laboratoire Kastler Brossel
Tuesday, November 30, 2021
5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
The physics of many-body systems strongly depends on their dimensionality. With the realization of quantum wells for example, it has been possible to produce two-dimensional gases of electrons, which exhibit properties that differ dramatically from the standard three-dimensional case. More recently, a novel environment has been developed for the study (...)

- Colloquium 2021-2022

How a physical system can be turned into a self-learning machine

Colloquium — 2021-09-28T07:04:24Z

Florian Marquardt, Max Planck Institute for the Science of Light and Friedrich-Alexander-Universität Erlangen-Nürnberg
Tuesday, October 5, 2021 5:15 p.m. — room Jaures (29 rue d'Ulm, 75005 Paris)
Machine learning using artificial neural networks is revolutionizing many areas of science and technology. This increases the urgency for exploring alternatives to artificial neural networks running on digital hardware. These alternatives might eventually be faster and/or more power-efficient. With (...)

- Colloquium 2021-2022

| CANCELLED | - The Einstein Telescope project and the future of the earth-based gravitational-wave astronomy

Colloquium — 2020-02-27T13:58:26Z

Matteo Barsuglia
Laboratoire Astroparticules et Cosmologie (APC), université Paris Diderot
-----> CANCELLED
Tuesday, March 3, 2020
5:15 p.m. — room conf IV (24 rue Lhomond)
Gravitational astronomy, which began on September 14th, 2015 with the LIGO detection of the merger of two black holes, has demonnstrated all its scientific potential during the 01 (LIGO) and 02 (LIGO-Virgo) observation periods, between 2015 and 2017. At present, LIGO and Virgo are carrying out a third observation run, (...)

- Colloquium - 2019/2020