Three-body bound states in antiferromagnetic spin ladders

Gary Schmiedinghoff; Leanna Müller; Umesh Kumar; Götz S. Uhrig; Benedikt Fauseweh

doi:10.1038/s42005-022-00986-0

Three-body bound states in antiferromagnetic spin ladders

Gary Schmiedinghoff, Leanna Müller, Umesh Kumar, Götz S. Uhrig, Benedikt Fauseweh

Materials Theory

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13 Scopus citations

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.

Original language	English
Article number	218
Journal	Communications Physics
Volume	5
Issue number	1
DOIs	https://doi.org/10.1038/s42005-022-00986-0
State	Published - Dec 2022

Funding

This work was supported by the U.S. DOE NNSA under Contract No. 89233218CNA000001 via the LANL LDRD Program. G.S.U. is supported by the DFG under project No. UH90/14-1.

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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.",

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Three-body bound states in antiferromagnetic spin ladders

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