Robust control of long distance entanglement in disordered spin chains

TL;DR

This paper presents a method for generating long-distance entanglement in disordered spin chains using temporally shaped control pulses, ensuring robustness despite disorder.

Contribution

It introduces a novel control strategy based on a time-dependent target functional that maintains the validity of matrix product state descriptions during entanglement creation.

Findings

Long-distance entanglement can be achieved despite strong disorder.

The control method is effective in disordered interaction landscapes.

The approach ensures the validity of matrix product state descriptions throughout the process.

Abstract

We derive temporally shaped control pulses for the creation of long-distance entanglement in disordered spin chains. Our approach is based on a time-dependent target functional and a time-local control strategy that permits to ensure that the description of the chain in terms of matrix product states is always valid. With this approach, we demonstrate that long-distance entanglement can be created even for substantially disordered interaction landscapes.