Freezing distributed entanglement in spin chains

TL;DR

This paper presents a method to preserve entanglement in spin chains using single-qubit operations, enabling its use in quantum communication and processing across various physical systems.

Contribution

The authors introduce a simple technique to freeze distributed entanglement in spin chains, applicable to multiple physical implementations.

Findings

Entanglement can be effectively frozen using single-qubit operations.

Frozen entanglement is useful for teleportation and quantum processing.

The scheme is versatile across different physical systems.

Abstract

We show how to freeze distributed entanglement that has been created from the natural dynamics of spin chain systems. The technique that we propose simply requires single-qubit operations and isolates the entanglement in specific qubits at the ends of branches. Such frozen entanglement provides a useful resource, for example for teleportation or distributed quantum processing. The scheme can be applied to a wide range of systems -- including actual spin systems and alternative qubit embodiments in strings of quantum dots, molecules or atoms.