Three-dimensional (higher-spin) gravities with extended Schrödinger and $l$-conformal Galilean symmetries

Dmitry Chernyavsky, Dmitri Sorokin

We show that an extended $3D$ Schrödinger algebra introduced in [1] can be reformulated as a $3D$ Poincaré algebra extended with an SO(2) R-symmetry generator and an $SO(2)$ double…