Superstring sigma models from spin chains: the image case Original Research Article

We derive the coherent state representation of the integrable spin chain Hamiltonian with non-compact supersymmetry group image. By passing to the continuous limit, we find a spin chain sigma model describing a string moving on the supercoset image, H being the stabilizer group. The action is written in a manifestly G-invariant form in terms of the Cartan forms and the string coordinates in the supercoset.