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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
wifi event
Date
Sep 14, 2022   4:00 pm   5:00pm
Speaker
Taylor Hughes (UIUC)
Contact
Kelly Darr
E-Mail
khdarr@illinois.edu
Phone
12173007821
Views
154
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.

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