Cheshire θ Terms, Aharonov-Bohm Effects, and Axions

This lecture explores the concept of Cheshire θ terms in field theories that allow global vortices. Delve into how these unusual θ terms induce Aharonov-Bohm effects when particles move around vortices, with potential observable implications for axion cosmology. Learn about a general framework for constructing θ terms in quantum field theories that not only encompasses standard textbook θ terms but also extends to Cheshire θ terms and other generalizations. Presented by Aleksey Cherman from the PCS Institute for Basic Science, this 49-minute talk provides insights into advanced concepts at the intersection of quantum field theory and cosmology.