Cavity-mediated Interaction in a Bragg Interferometer (I): One-axis Twisting and Mössbauer-like Suppression of Doppler Dephasing
ORAL
Abstract
Laser-cooled atoms interacting via photon-mediated interactions are powerful platforms for quantum simulation and sensing. Here we realize for the first time momentum-exchange interactions in which pairs of atoms exchange their momentum states via collective emission and absorption of photons from a common cavity mode, a process equivalent to a spin-exchange or XX collective Heisenberg interaction. The momentum-exchange interaction leads to an experimentally observed all-to-all Ising-like interaction in a Bragg matter-wave interferometer, which is useful for entanglement generation. An experimentally observable many-body energy gap also emerges, effectively binding interferometer matter-wave packets together to suppress Doppler dephasing with analogies to Mössbauer 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.
*This material is based upon work supported by the US Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Systems Accelerator. We acknowledge additional funding support from the National Science Foundation under Grant Nos. 2317149 (Physics Frontier Center) and OMA-2016244 (Quantum Leap Challenge Institutes), and the National Institute of Standards and Technology.
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Publication: [1] arXiv:2304.01411
[2] Young, D.J., Chu, A., Song, E.Y. et al. Observing dynamical phases of BCS superconductors in a cavity QED simulator. Nature 625, 679–684 (2024). https://doi.org/10.1038/s41586-023-06911-x
Presenters
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Chitose Maruko
- University of Colorado, Boulder