Cavity-Mediated Collective Momentum-Exchange Interactions
Abstract
Quantum simulation and sensing hold great promise for providing new insights into nature, from understanding complex interacting systems to searching for undiscovered physics. Large ensembles of laser-cooled atoms interacting via infinite-range photon mediated interactions are a powerful platform for both endeavours. Here, we realize for the first time momentum-exchange interactions in which atoms exchange their momentum states via collective emission and absorption of photons from a common cavity mode. The momentum-exchange interaction leads to an observed all-to-all Ising-like interaction in a matter-wave interferometer, which is useful for entanglement generation. A many-body energy gap also emerges, effectively binding interferometer matter-wave packets together to suppress Doppler dephasing, akin to M\"ossbauer spectroscopy. The tunable momentum-exchange interaction provides a new capability for quantum interaction-enhanced matter-wave interferometry and for realizing exotic behaviors including simulations of superconductors and dynamical gauge fields.
Cite
@article{arxiv.2304.01411,
title = {Cavity-Mediated Collective Momentum-Exchange Interactions},
author = {Chengyi Luo and Haoqing Zhang and Vanessa P. W. Koh and John D. Wilson and Anjun Chu and Murray J. Holland and Ana Maria Rey and James K. Thompson},
journal= {arXiv preprint arXiv:2304.01411},
year = {2023}
}
Comments
Main Text with Supporting Material, 17 pages, 5 figures