paper

Integrable supersymmetric deformations of

arXiv:2206.12347 · doi:10.1007/JHEP09(2022)018

Abstract

We construct a family of type IIB string backgrounds that are deformations of with a "squashed" metric supported by a combination of NSNS and RR fluxes. They have global symmetry, regular curvature, constant dilaton and preserve 8 supercharges. Upon compactification to 4 dimensions they reduce to supersymmetric solutions with electric and magnetic Maxwell fluxes. These type IIB supergravity solutions can be found from the undeformed background by a combination of T-dualities and S-duality. In contrast to T-duality, S-duality transformations of a type IIB supergravity background do not generally preserve the classical integrability of the corresponding Green-Schwarz superstring sigma model. Nevertheless, we show that integrability is preserved in the present case. Indeed, we find that these backgrounds can be obtained, up to T-dualities, from an integrable inhomogeneous Yang-Baxter deformation (with unimodular Drinfel'd-Jimbo R-matrix) of the original supercoset model.

34 pages, minor corrections

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