Vacuum Entanglement Harvesting in the Ising Model

TL;DR

This paper demonstrates a protocol for extracting Bell pairs from the ground state of the transverse-field Ising model, analyzing its efficiency across different phases and near quantum criticality using tensor network methods.

Contribution

It introduces a novel entanglement harvesting protocol for spin chains and explores its optimization and behavior near quantum critical points.

Findings

Successful distillation of Bell pairs from the Ising model ground state

Variation of entanglement distillation rate across different phases

Insights into protocol performance near quantum criticality

Abstract

The low-energy states of quantum many body systems, such as spin chains, are entangled. Using tensor network computations, we demonstrate a protocol that distills Bell pairs out of the ground state of the prototypical transverse-field Ising model. We explore the behavior of rate of entanglement distillation in various phases, and possible optimizations of the protocol. Finally, we comment on the protocol as we approach quantum criticality defining a continuum field theory.