Physics Colloquium: Taylor Hughes (UIUC), Title: Defeating the Chiral Doubling Theorem: Three paths to new phenomena
- Event Type
- Lecture
- Sponsor
- Department of Physics
- Location
- Loomis Lab 141 and via Zoom
- Virtual
- Join online
- Date
- Sep 14, 2022 4:00 pm 5:00pm
- Speaker
- Taylor Hughes (UIUC)
- Contact
- Kelly Darr
- khdarr@illinois.edu
- Phone
- 12173007821
- Views
- 263
- Originating Calendar
- Physics - Colloquium
Over forty years ago, Nielsen and Ninomiya proved that chiral modes cannot exist in discrete systems without a matching anti-chiral partner. While this theorem was proved in the context of simulating the weak interactions of the standard model on a lattice, it is far more general and has implications across a broad spectrum of physics sub-fields. In this talk I will discuss three ways to violate the theorem by avoiding the assumptions. I will illustrate that each type of violation is responsible for a new class of topological phenomena. If time permits I will also discuss a new type of chirality that can appear in only non-relativistic systems in two spatial dimensions and its realization in topo-electric circuits.