CMSA Quantum Matter in Mathematics and Physics: Exact symmetries and threshold states in two-dimensional models for QCD


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March 17, 2021 10:30 am - 12:00 pm
via Zoom Video Conferencing

Silviu Pufu - Princeton University

Two-dimensional QCD models form an interesting playground for studying phenomena such as confinement and screening.  In this talk I will describe one such model, namely a 2d SU(N) gauge theory with an adjoint and a fundamental fermion, and explain how to compute the spectrum of bound states using discretized light-cone quantization at large N.  Surprisingly, the spectrum of the discretized theory exhibits a large number of exact degeneracies, for which I will provide two different explanations.  I will also discuss how these degeneracies provide a physical picture of confinement in 2d QCD with just a massless adjoint fermion.  This talk is based on joint work with R. Dempsey and I. Klebanov.