MPS and spin one-half ladders

Studying spin ladders as low dimensional quantum systems is in special interest due to discovery of high temperature superconductivity. In this poster, we try to describe two legs spin 1/2 with fully rotational symmetric ladder. We use MPS formalism to model the spin ladder, then by applying the full rotational symmetry we get a completely rotational symmetric model. At last there are some parameters left which construct a family of MPS models, all describing two legs spin 1/2 fully rotational symmetric ladders with some similar properties.