13 Questions
Who introduced the large N expansion in Yang-Mills?
't Hooft
What theory did 't Hooft show could be solved using the large N expansion?
QCD in two dimensions
What is the connection between string theory and the large N expansion?
It can be made explicit in a number of low dimensional examples; the lectures by Ginsparg and Moore are a good place to start.
Who introduced the large N expansion in Yang-Mills?
't Hooft
What theory did 't Hooft show could be solved using the large N expansion?
QCD in two dimensions
Who showed that dependence on the angle survives in the large N limit?
Witten
Who introduced the 1/D expansion in atomic physics?
Witten
What is the Dashen phase?
The idea that QCD at $\theta = \pi$ spontaneously breaks time reversal
What is the connection between AdS/CFT correspondence and the large N expansion?
In d = 3+1 dimensions, the AdS/CFT correspondence is based on the relationship between string theory and the large N expansion
Who provided a gentle introduction to the 1/N expansion?
Coleman
Who wrote an excellent review of the phenomenology of large N QCD?
Manohar
Who provided lectures on the gauge/gravity duality and its connection to string theory?
McGreevy
What is the 't Hooft model?
QCD in two dimensions
Test your knowledge on the large N expansion in Yang-Mills and the contributions of 't Hooft and Witt in solving QCD in two dimensions. Explore the fascinating 't Hooft model and the role of baryons in the 1/N expansion.
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