A5058685289- Micro and Nano Robotics
- Modular Robots and Swarm Intelligence
- Advanced Materials and Mechanics
- Advanced Thermodynamics and Statistical Mechanics
- Slime Mold and Myxomycetes Research
- Ecosystem dynamics and resilience
- Disaster Response and Management
- Quantum Mechanics and Applications
- Cardiac Arrest and Resuscitation
- Astro and Planetary Science
- Nuclear Issues and Defense
- Complex Systems and Time Series Analysis
- Nonlinear Dynamics and Pattern Formation
- Spacecraft Dynamics and Control
- Cellular Mechanics and Interactions
- Spectroscopy and Quantum Chemical Studies
Université Paris Sciences et Lettres
2022-2025
Institute for Atomic and Molecular Physics
2024-2025
Leiden University
2025
Gulliver
2022-2024
ESPCI Paris
2020-2024
Centre National de la Recherche Scientifique
2022-2024
Active solids such as cell collectives, colloidal clusters, and active metamaterials exhibit diverse collective phenomena, ranging from rigid body motion to shape-changing mechanisms. The nonlinear dynamics of materials remains, however, poorly understood when they host zero-energy deformation modes noise is present. Here, we show that stress propagation in a model induces the spontaneous actuation multiple soft floppy modes, even without exciting vibrational modes. By introducing an...
The recent finding of collective actuation in active solids-solids embedded with units-is a new promise for the design multifunctional materials genuine autonomy, and better understanding dense biological systems. Here, we combine experimental study centimetric model solids, numerical an agent-based model, theoretical arguments to reveal form how mechanical tension can serve as general mechanism transitioning between different regimes. presence hysteresis when varying back forth highlights...
Collective actuation describes the spontaneous synchronized oscillations taking place in active solids when elasto-active feedback, which generically couples reorientation of forces and elastic stress, is large enough. In absence noise, collective takes form a strong condensation dynamics on specific pair modes their generalized harmonics. Here we report experiments conducted with centimetric structures, where oscillation along single lowest energy mode system, gapped from other because...
Self-alignment describes the property of a polar active unit to align or anti-align its orientation towards velocity. In contrast mutual alignment, where headings multiple units tend directly each other -- as in celebrated Vicsek model --, self-alignment impacts dynamics at individual level by coupling rotation and displacements unit. This enriches even without interactions external forces, allows, for example, single self-propelled particle orbit harmonic potential. At collective level,...
Models based on spins or hysterons with appropriately chosen interactions can capture advanced memory effects in complex materials, such as transients repeatedly compressed crumpled sheets sequential computing driven metamaterials. However, unphysical self-loops dominate the response when are randomly, undermining statistical approaches. Here, we uncover origin of self-loop proliferation randomly coupled models. We introduce weakly asymmetric ensemble to suppress and then develop interaction...
Active solids such as cell collectives, colloidal clusters, and active metamaterials exhibit diverse collective phenomena, ranging from rigid body motion to shape-changing mechanisms. The nonlinear dynamics of materials remains however poorly understood when they host zero-energy deformation modes noise is present. Here, we show that stress propagation in a model induces the spontaneous actuation multiple soft floppy modes, even without exciting vibrational modes. By introducing an adiabatic...
Collective actuation describes the spontaneous synchronized oscillations taking place in active solids, when elasto-active feedback, that generically couples reorientation of forces and elastic stress, is large enough. In absence noise, collective takes form a strong condensation dynamics on specific pair modes their generalized harmonics. Here we report new experiments conducted with centimetric structures, where oscillation along single lowest energy mode system, gapped from other because...
Yves Couder created “PhyExp” at Paris Diderot University in 80s. This undergraduate course was meant to introduce experimental physics students through projects. approach proved fruitful both for and teachers has been replicated Ecole Supérieure de Physique et Chimie Industrielles (ESPCI). As a tribute Yves, we report here the results obtained during this about specific project, namely measurement of fluorescence lifetimes using stroboscopy fan. We obtain quantitative measurements Europium...