Séminaire Café (Interne)
Il s’agit d’un exposé assez court (20 min) et assez informel.
Prière aux conférencier·ère·s de ne jamais dépasser 30 min et de vérifier la compatibilité avec le projecteur avant le séminaire.
Les séminaires ont lieu les jeudis après la réunion du laboratoire qui débute à 13h30 dans la bibliothèque du labo sur le campus Jussieu, Barre Cassan, Bât A, 1er étage.
Pour suggérer un titre et envoyer un abstract, contacter Antoine Bouvier <> et Jeanne Moscatelli <> .
Coffee seminars are supposed to be short and informal presentations (20 min).
Please never last longer than 30 min and check the compatibility of the projector with your computer before the seminar.
Location : Campus Jussieu, Barre Cassan, Bât A, 1er étage
7 quai Saint Bernard
75005 Paris
To suggest a title or send an abstract, please contact Antoine Bouvier <> and Jeanne Moscatelli <> ..
21 mars | PhD student : Baptiste AUVITY & Camille RAMBERT |
28 mars | Andrea Plati Post-doctorant at LPS Self-assembly of crystals and quasi-crystals in vibrated granular matter Abstract : Granular materials provide an accessible and diverse playground for nonequilibrium physics. When subjected to mechanical vibrations, they undergo so-called vibrofluidisation, reaching a nonequilibrium steady state through the balance between dissipation and external forcing. It has been known for more than two decades that monodisperse vibrofluidised granular materials undergo a liquid-solid-like phase transition to a hexagonal periodic structure similar to that of hard-sphere thermal systems. In my talk I will present experimental and numerical results showing how this analogy extends to the case of granular binary mixtures, which form much more complex structures. I will report on our recent experimental observation of spontaneous quasi-crystalline self-assembly on the millimetre scale [1]. This result is obtained in a fully athermal system of spherical grains vibrating on a substrate. Starting from a liquid-like disordered phase, the grains begin to locally arrange into three types of square and triangular tiles, which eventually align to form an eightfold symmetric quasi-crystal, which has been predicted by simulation but not yet observed experimentally in non-atomic systems. I will also outline an ongoing analysis focusing on the self-assembly of a simpler structure (i.e. a periodic square binary crystal), which provides a particularly suitable testing ground for better understanding the physical mechanisms underlying ordering phenomena in athermal systems. [1] : A. Plati, R. Maire, E. Fayen, F. Boulogne, F. Restagno, F. Smallenburg, and G. Foffi, Nature Physics 20, 465–471 (2024) |
4 avril | PhD student : Kexin ZHAO & Nathan VANI |
11 avril | Wladimir Sarlin Post-doc at LadHyX |
18 avril | PhD student : Bérénice DUPONT & Summary |
25 avril | Krishan Bumma PhD student at Institut d’Alembert |
2 mai | Friedrich Walzel PhD student at Institut Charles Sadron (Strasbourg university) |
9 mai | No coffee seminar (holiday) |
16 mai | TBA |
23 mai | Kevin Matías Simpson Alfaro Post-doctorant at Pontificia Universidad Católica de Chile |
30 mai | Corentin Bisot PhD student at AMOLF, Amsterdam |