@article{13648,
  author = {Chengyi Luo and Haoqing Zhang and Chitose Maruko and Eliot Bohr and Anjun Chu and Ana Rey and James Thompson},
  title = {Realization of three- and four-body interactions between momentum states in a cavity},
  abstract = {Spin Hamiltonians in condensed matter and quantum sensing typically utilize pairwise or two-body interactions between constituents in the material or ensemble. However, there is growing interest in exploring more general n-body interactions for n \textgreater 2. In this study, we realized an effective n = 3-body Hamiltonian interaction using an ensemble of laser-cooled atoms in a high-finesse optical cavity with the pseudospin 1/2 encoded by two atomic momentum states. We applied two dressing tones that induce the atoms to exchange photons via the cavity to realize a virtual six-photon process; lower-order interactions destructively interfered. We also observed signatures of a n = 4-body interaction mediated by a virtual eight-photon process. Our approach may be extensible to three-body interactions in multilevel systems or to even higher-order interactions.},
  year = {2025},
  journal = {Science},
  volume = {390},
  number = {6776},
  pages = {925-929},
  month = {nov},
  url = {https://www.science.org/doi/10.1126/science.adv0990},
  doi = {10.1126/science.adv0990},
  note = {Publisher: American Association for the Advancement of Science},
}