When finite-size corrections vanish: The S=1/2 XXZ model and the Razumov-Stroganov state

Leonardo Banchi, Filippo Colomo, Paola Verrucchi

We study the one-dimensional $S=1/2$ XXZ model on a finite lattice at zero temperature, varying the exchange anisotropy $\Delta$ and the number of sites $N$ of the lattice. Special emph…