Ground-state entanglement of spin-1 bosons undergoing superexchange interactions in optical superlattices

TL;DR

This paper investigates the ground-state entanglement of spin-1 bosons in optical superlattices, revealing how external parameters influence magnetic phases and bipartite entanglement, with potential applications in quantum information processing.

Contribution

It introduces a detailed analysis of ground-state properties and entanglement in a spin-1 boson model within optical superlattices, highlighting parameter-dependent phase transitions.

Findings

Different magnetic phases are realized depending on external magnetic field and interactions.

Bipartite entanglement can be tuned by adjusting superlattice parameters.

System can switch between various entangled states based on parameter changes.

Abstract

We discuss a model with ultra-cold atoms confined in optical superlattices. In particular, we study the ground-state properties of two spin-1 bosons trapped in a double-well potential. Depending on the external magnetic field and biquadratic interactions different phases of magnetic order are realized. Applying von Neumann entropy and number of relevant orbitals, we quantify the bipartite entanglement between particles. Changing the values of the parameters determining superlattices, we can switch the system between differently entangled states.