Tutorial: Extracting entanglement signatures from neutron spectroscopy

TL;DR

This tutorial introduces methods to compute quantum spin entanglement witnesses from neutron spectroscopy data, providing practical protocols and examples for experimental analysis of entanglement in quantum spin systems.

Contribution

It presents a comprehensive pedagogical guide on extracting entanglement signatures from neutron scattering data, including data analysis protocols and interpretation of multiple entanglement witnesses.

Findings

Demonstrated extraction of entanglement witnesses from experimental data

Provided practical protocols for data analysis in neutron spectroscopy

Discussed interpretation of entanglement measures in real materials

Abstract

This tutorial is a pedagogical introduction to recent methods of computing quantum spin entanglement witnesses from spectroscopy, with a special focus on neutron scattering on quantum spin systems. We offer a brief introduction to the concepts and equations, define a data analysis protocol, and discuss the interpretation of three entanglement witnesses: one-tangle, two-tangle, and Quantum Fisher Information. We also discuss practical experimental considerations, and give three examples of extracting entanglement witnesses from experimental data: Copper Nitrate, KCuF3, and NiPS3.