Double and cyclic $\lambda$-deformations and their canonical equivalents
Abstract
We prove that the doubly lambda-deformed sigma-models, which include integrable cases, are canonically equivalent to the sum of two single lambda-deformed models. This explains the equality of the exact beta-functions and current anomalous dimensions of the doubly lambda-deformed sigma-models to those of two single lambda-deformed models. Our proof is based upon agreement of their Hamiltonian densities and of their canonical structure. Subsequently, we show that it is possible to take a well defined non-Abelian type limit of the doubly-deformed action. Last, but not least, by extending the above, we construct multi-matrix integrable deformations of an arbitrary number of WZW models.
Cite
@article{arxiv.1704.07834,
title = {Double and cyclic $\lambda$-deformations and their canonical equivalents},
author = {George Georgiou and Konstantinos Sfetsos and Konstantinos Siampos},
journal= {arXiv preprint arXiv:1704.07834},
year = {2019}
}
Comments
1+17 pages, Latex; v2: PLB version, v3: Correcting a typo in Eq.(3.7)