Three-body bound states in antiferromagnetic spin ladders
Abstract
Stable bound quantum states are ubiquitous in nature. Mostly, they result from the interaction of only pairs of particles, so called two-body interactions, even when large complex many-particle structures are formed. We show that three-particle bound states occur in a generic, experimentally accessible solid state system: antiferromagnetic spin ladders, related to high-temperature superconductors. This binding is induced by genuine three-particle interactions; without them there is no bound state. We compute the dynamic exchange structure factor required for the experimental detection of the predicted state by resonant inelastic X-ray scattering for realistic material parameters. Our work enables us to quantify these elusive interactions and unambiguously establishes their effect on the dynamics of the quantum many-particle state.
Cite
@article{arxiv.2012.01513,
title = {Three-body bound states in antiferromagnetic spin ladders},
author = {Gary Schmiedinghoff and Leanna Müller and Umesh Kumar and Götz S. Uhrig and Benedikt Fauseweh},
journal= {arXiv preprint arXiv:2012.01513},
year = {2022}
}
Comments
15 pages, 5 figures + Supplemental Material