Few-Body Universality - What Do We Mean by This and Why Do We Care?

Explore the concept of Few-Body Universality in this comprehensive lecture by Doerte Blume from Oklahoma. Delve into the meaning and significance of this phenomenon in theoretical physics. Examine key topics such as unitarity, maximum scattering, two-component Fermi gas, length scales, symmetry, continuous and discrete scaling, universal numbers, and helium. Gain insights into open questions in the field. This Blackboard Lunch talk, presented at the Kavli Institute for Theoretical Physics, aims to bridge understanding across different physics programs and foster interdisciplinary communication.

Intro
Unitarity
Maximum Scattering
FewBody Universality
Twocomponent femi gas
Length scales
Universality
Symmetry
Continuous Scaling
Universal Numbers
New Length Scale
Discrete Scaling
Helium
Open Questions