Bethe ansatz solution of the $Osp(1|2n)$ invariant spin chain

TL;DR

This paper solves the $Osp(1|2n)$ invariant spin chain using the analytical Bethe ansatz, deriving ground state energy, dispersion relations, and finite size properties, revealing a central charge of $c=n$.

Contribution

It provides the first analytical Bethe ansatz solution for the $Osp(1|2n)$ invariant spin chain, including energy spectra and finite size analysis.

Findings

Ground state energy calculated

Low-lying dispersion relation obtained

Finite size analysis shows central charge c=n

Abstract

We have applied the analytical Bethe ansatz approach in order to solve the $Osp(1|2n)$ invariant magnet. By using the Bethe ansatz equations we have calculated the ground state energy and the low-lying dispersion relation. The finite size properties indicate that the model has a central charge $c=n$.