Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-04-16
Adv.Theor.Math.Phys.2:987-1009,1998
Physics
High Energy Physics
High Energy Physics - Theory
23 pages, 3 figures (published version)
Scientific paper
I show that physical quantities in several two-dimensional condensed-matter models are related to the Seiberg-Witten calculation of exact quantities in supersymmetric gauge theory. In particular, the magnetization in the Kondo problem and the current in the boundary sine-Gordon model can each be expressed in the form $\int dx/y$, where for example in the latter $y^2 = x + x^g - u^2$ with u related to the boundary mass scale (the analog of \Lambda_{QCD}) and g proportional to the radius of the boson squared. Thus for irrational g, the curve y(x) is of infinite genus, while for rational g it is of finite genus. The models are integrable and possess a quantum-group symmetry for any g, but are supersymmetric only at g=2/3. Both models also possess unique forms of g to 1/g duality.
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