منابع مشابه
Heterotic Coset Models
A description is given of how to construct (0, 2) supersymmetric conformal field theories as coset models. These models may be used as non–trivial backgrounds for Heterotic String Theory. They are realised as a combination of an anomalously gauged Wess–Zumino–Witten model, right–moving supersymmetric fermions, and left–moving current algebra fermions. Requiring the sum of the gauge anomalies fr...
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Several interesting features of coset models " without fixed points " are easily understood via Chern-Simons theory. In this paper we derive explicit formulae for the handle-squashing operator in these cosets. These operators are fixed, linear combinations of the irreducible representations of the coset. As a simple application of these curious formulae, we compute the traces of all genus-one o...
متن کاملFermionic Coset Models as Topological Models
By considering the fermionic realization of G/H coset models, we show that the partition function for the U(1)/U(1) model defines a Topological Quantum Field Theory and coincides with that for a 2dimensional Abelian BF system. In the non-Abelian case, we prove the topological character of G/G coset models by explicit computation, also finding a natural extension of 2-dimensional BF systems with...
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Sigma models arise frequently in particle physics and condensed-matter physics as lowenergy effective theories. In this paper I compute the exact free energy at any temperature in two hierarchies of integrable sigma models in two dimensions. These theories, the SU(N)/SO(N) models and the O(2P )/O(P ) × O(P ) models, are asymptotically free and exhibit charge fractionalization. When the instanto...
متن کاملT-Duality for Coset Models
We construct dual Lagrangians for G/H models in two space-time dimensions for arbitrary Lie groups G and H ⊂ G. Our approach does not require choosing coordinates on G/H, and allows for a natural generalization to Lie-Poisson duality. For the case where the target metric on G/H is induced from the invariant metric on G, the dual system is a gauged Higgs model, with a nonconstant metric and a co...
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ژورنال
عنوان ژورنال: Reviews in Mathematical Physics
سال: 2004
ISSN: 0129-055X,1793-6659
DOI: 10.1142/s0129055x0400200x