منابع مشابه
Integrable sigma models and perturbed coset models
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...
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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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We consider superstring sigma models that are based on coset superspaces G/H in which H arises as the fixed point set of an order-4 automorphism of G. We show by means of twistor theory that the corresponding first-order system, consisting of the Maurer-Cartan equations and the equations of motion, arises from a dimensional reduction of some generalised self-dual Yang-Mills equations in eight d...
متن کاملHandle Operators of Coset Models*
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 کاملSuperstrings on AdS4 × CP as a Coset Sigma-model
According to the recent proposal by Aharony, Bergman, Jafferis and Maldacena the N = 6 supersymmetric Chern-Simons theory in three dimensions has a ’t Hooft limit whose holographic dual is described by type IIA superstings on AdS4 × CP background. We argue that the Green-Schwarz action for type IIA string theory on AdS4×CP with κ-symmetry partially fixed can be understood as a coset sigma-model...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2013
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2013.10.026