Colloquium Event

Video from Cristina Marchetti, University of California, Santa Barbara - “Active Topology”

Tue February 16th 2021, 4:30pm

Video Link


Stanford University




Tuesday, February 16, 2021

4:30 p.m. via Zoom

Email dmoreau [at] (dmoreau[at]stanford[dot]edu) for password.


Cristina Marchetti
University of California, Santa Barbara


“Active Topology”


Topology plays a key role in condensed matter physics, underlying much of our understanding of equilibrium matter in terms of defects in ordered media and topologically protected states. In active systems – collections of entities that consume energy to generate their own motion and forces – topological phenomena can take on new and surprising roles. I will describe some of these behaviors focusing on liquid-crystalline active matter in two dimensions, specifically active nematic liquid crystals, where defects become motile particles, drive spatio-temporally chaotic flows, and can themselves organize in emergent ordered states.