Research Seminars @ Illinois

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Tailored for undergraduate researchers, this calendar is a curated list of research seminars at the University of Illinois. Explore the diverse world of research and expand your knowledge through engaging sessions designed to inspire and enlighten.

To have your events added or removed from this calendar, please contact OUR at ugresearch@illinois.edu

Anthony J Leggett Institute for Condensed Matter Theory Seminar - Bruno Uchoa (University of Oklahoma), "Quantum geometry in flat bands"

Event Type
Seminar/Symposium
Sponsor
Physics - The Anthony J Leggett Institute for Condensed Matter Theory
Location
ESB Lab 3110
Date
Oct 7, 2025   12:00 - 1:00 pm  
Speaker
Bruno Uchoa
Contact
Thierry Ramais
E-Mail
ramais@illinois.edu
Phone
217-300-2044
Views
74
Originating Calendar
Physics - The Anthony J Leggett Institute for Condensed Matter Theory Seminar

Title: "Quantum Geometry in Flat Bands"

Abstract: By endowing the Hilbert space with a metric and a curvature, the modern theory of solids resorts to tools from differential geometry and topology to analyze the physical properties of electrons in a crystal. After introducing the concept of the quantum geometric tensor, I will explore implications of the quantum geometry in flat bands, where the quasiparticles have zero group velocity. I will then address the possibility of using pumped light in flat Chern bands to create out-of-equilibrium excitons with finite vorticity in momentum space. Those excitons, called topological excitons, have their vorticity set by the difference between the Chern numbers in the conduction and valence bands. Topological excitons can be found optically through the non-linear Hall effect and can condense into a novel type of topological neutral superfluid. 

Zoom Link: https://illinois.zoom.us/my/icmt.seminar?pwd=ZU1KbnBLeXZLUmJKc0oyU205cDNDdz09

Meeting ID: 791 382 8328

Password: 106237

link for robots only