Abstract
We derive, within the Hamiltonian formalism, the classical exchange algebra of a lambda deformed string sigma model in a symmetric space directly from a 4d holomorphic Chern-Simons theory. The explicit forms of the extended Lax connection and R-matrix entering the Maillet bracket of the lambda model are explained from a symmetry principle. This approach, based on a gauge theory, may provide a mechanism for taming the non-ultralocality that afflicts most of the integrable string theories propagating in coset spaces.
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Schmidtt, D.M. Symmetric space λ-model exchange algebra from 4d holomorphic Chern-Simons theory. J. High Energ. Phys. 2021, 4 (2021). https://doi.org/10.1007/JHEP12(2021)004
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DOI: https://doi.org/10.1007/JHEP12(2021)004