Integrable λ-deformations: squashing coset CFTs and AdS5 × S5

We examine integrable λ -deformations of SO( n + 1) / SO( n ) coset CFTs and their analytic continuations. We provide an interpretation of the deformation as a squashing of the corresponding coset σ -model’s target space. We realise the λ -deformation for n = 5 case as a solution to supergravity supported by non-vanishing five-form and dilaton. This interpolates between the coset CFT SO(4 , 2) / SO(4 , 1) × SO(6) / SO(5) constructed as a gauged WZW model and the non-Abelian T-dual of the AdS 5 × S 5 spacetime.