Controlled generation of genuine multipartite entanglement in Floquet Ising spin models

TL;DR

This paper introduces a method to generate genuine multipartite entangled states in Floquet Ising spin models using periodic magnetic pulses, with potential applications in quantum information processing.

Contribution

It demonstrates a controlled approach to produce highly entangled states in both integrable and non-integrable Floquet systems with constant quasi-energy gaps.

Findings

High entanglement states achieved from polarized spins.

States involve many parties as shown by quantum Fisher information.

Potential for quantum information processing applications.

Abstract

We propose a method for generation of genuine multipartite entangled states in a short-range Ising spin chain with periodic global pulses of magnetic field. We consider an integrable and a non-integrable Floquet system that are periodic in time and have constant quasi-energy gaps with degeneracies. We start with all spins polarized along one direction and show that they evolve into states with high entanglement by calculating the average entanglement entropy and geometric measure of entanglement. We show that some of these states have a high number of parties involved in the entanglement by calculating the quantum Fisher information. Such controlled generation of multipartite entanglement has potential applications in quantum information processing.