IQIM Postdoctoral and Graduate Student Seminar

Series: IQIM Postdoctoral and Graduate Student Seminar Series

Many-body Interactions between Matter Waves Mediated by a High Finesse Cavity

Chengyi Luo, AWS Quantum Postdoctoral Scholar, Faraon Group,

Abstract: Large ensembles of laser-cooled atoms interacting via photon-mediated interactions are powerful platforms for quantum simulation and sensing. In this talk, I will present a cavity-QED system with matter waves coupled to a high-finesse cavity. In this system, by coupling external states to atomic internal states, we successfully generated entanglement between atomic momentum states and realized the first entangled matter-wave interferometer [1]. Without coupling the momentum states to the spin states, we also realized momentum-exchange interactions [2] and collective XYZ models [3] in a Bragg interferometer, which leads to a collective recoil mechanism that effectively binds wave packets together to suppress Doppler dephasing, and the first demonstration of two-axis counter-twisting dynamics with momentum states. I will conclude the talk with a recent experiment where we realize three and four-body interaction between momentum states [4], paving the way for quantum simulation beyond pair-wise interactions and generation of exotic entangled states.

[1] G. P. Greve*, C. Luo*, B. Wu, J. K. Thompson, Nature 610, 472-477 (2022)[2] C. Luo, H. Zhang, V. P. W. Koh, J. D. Wilson, A. Chu, M. J. Holland, A. M. Rey, J. K. Thompson, Science 384, 551-556 (2024)[3] C. Luo*, H. Zhang*, A. Chu, C. Maruko, A. M. Rey, J. K. Thompson, arXiv preprint, arXiv: 2402.19429 (2024)[4] C. Luo, H. Zhang, A. Chu, C. Maruko, A. M. Rey, J. K. Thompson, arXiv preprint, arXiv:2410.12132 (2024)

Lunch will be provided following the talk.

Event Sponsors:

Institute for Quantum Information and Matter (IQIM) - More events from this Sponsor

For more information, please contact Marcia Brown by phone at 626-395-4013 or by email at [email protected].

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