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Tutorial: Extracting entanglement signatures from neutron spectroscopy

Scheie, Allen Olaf [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000274505138)·Laurell, Pontus [University of Missouri, Columbia, MO (United States)] (ORCID:0000000235254145)·Simeth, Wolfgang Josef [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000198901816)·Dagotto, Elbio R. [University of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)]·Tennant, David Alan [University of Tennessee, Knoxville, TN (United States)] (ORCID:0000000295753368)
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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, KCuF 3 , and NiPS 3 .

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47 OTHER INSTRUMENTATIONEntanglement witnessMaterials scienceNeutron spectroscopyQuantum magnetism

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Scheie, Allen Olaf [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000274505138), Laurell, Pontus [University of Missouri, Columbia, MO (United States)] (ORCID:0000000235254145), Simeth, Wolfgang Josef [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000198901816), Dagotto, Elbio R. [University of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], Tennant, David Alan [University of Tennessee, Knoxville, TN (United States)] (ORCID:0000000295753368). 2024-12-16. Tutorial: Extracting entanglement signatures from neutron spectroscopy. https://doi.org/10.1016/j.mtquan.2024.100020

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