Lattice-enabled detection of spin-dependent three-body interactions
Phys. Rev. A 113, 043304 – Published 6 April, 2026
DOI: https://doi.org/10.1103/l53b-xcn5
Abstract
We present the experimental detection of signatures of coherent three-body interactions, often masked by stronger two-body effects, through nonequilibrium spin dynamics induced by controllably quenching lattice-confined spinor gases. Three-body interactions are precisely characterized through both real-time and frequency-domain analyses of the observed dynamics. Our results, well described by an extended Bose-Hubbard model, further demonstrate the importance of three-body interactions for correctly determining atom distributions in lattice systems and have applications in quantum sensing via spin singlets. The techniques demonstrated in this work can be directly applied to other atomic species, offering a promising avenue for future studies of higher-body interactions with broad relevance to strongly interacting quantum systems.
