“Active matter: from active liquids to active solids”

In this talk a summary of key results found by the Espinoza team on active dry liquids, and more recently, on active solids, will be discussed. Starting with active dry liquids, a human crowd is experimentally studied. From this, a state of dynamic emergence (to be defined in the talk) was observed. Moreover, the introduction of an interacting inertial active Brownian particle model was numerically seen to reproduce such  a complex state. Finally, the last branch of active matter called active elastics solids is discussed. Here, using simulations, it is observed that an active elastic solid made of nonlinear hard springs presents collective behavior and stiffens with respect to a passive one. In another numerical and theoretical project, contracting forces are also seen to stiffen and soften a nonlinear one-dimensional active elastic solid. Finally, the introduction of nonreciprocal forces to this nonlinear active solid is seen (both theoretically and numerically) to generate accelerating solitons whose amplitude grows in time. 

Transmisión en vivo vía bit.ly/YouTube_ICF

Participante: Dr. Mario Sandoval Espinoza

Institución: Universidad Autónoma Metropolitana, UAM

Fecha y hora: Este evento terminó el Miércoles, 12 de Noviembre de 2025