![]() ![]() This provides, therefore, a direct link between the special limit of the λ-model and the PR model (conjectured in , and recently made explicit in ). 2 The special point ϰ=i of the η-model is a pp-wave background that for low-dimensional examples is equivalent in the light-cone gauge to the Pohlmeyer-reduced (PR) model for the coset theory. Superstring 3.3.4 Crack:Īt the same time, it turns out there is also another, more surprising, relation: the η-model can be obtained directly from the λ-model as a special limit (combined with an analytic continuation), which in some sense cuts off the asymptotically flat region. We also suggest that the two models may form a dual Poisson–Lie pair and provide direct evidence for this in the case of the integrable deformations of the cost associated with. ![]() For the case we then explore the effect of this limit on the supergravity background associated with the λ-deformed model. The relation between the couplings and deformation parameters is consistent with the interpretation of the first model as a real quantum deformation and the second as a root of unity quantum deformation. We show that the η-deformed model may be obtained from the λ-deformed one by a special scaling limit and analytic continuation in coordinates combined with a particular identification of the parameters of the two models. ![]() We consider two integrable deformations of 2d sigma models on supersets associated with. The first, the “ η-deformation” (based on the Yang–Baxter sigma model), is a one-parameter generalization of the standard superstring action on, while the second, the “ λ-deformation” (based on the deformed gauged WZW model), is a generalization of the non-abelian T-dual of the superstring. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
March 2023
Categories |