XX model on the circle

TL;DR

This paper analyzes the XX spin model on a finite circle, providing solutions for the ground state, examining convergence to the thermodynamic limit, and exploring multipartite entanglement features.

Contribution

It offers an exact diagonalization of the finite XX model with periodic boundaries and investigates entanglement properties and convergence behavior.

Findings

Explicit ground state solutions for finite XX model

Analysis of convergence speed to thermodynamic limit

Characterization of multipartite entanglement features

Abstract

We diagonalize the XX model with a finite number of spins and periodic boundary conditions. We solve for the ground state, focus on the rapidity of the convergence to the thermodynamic limit and study the features of multipartite entanglement.