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arXiv · 2607.21515

Extended Single-Atom Tweezer Arrays in High-Cooperativity Cavity-QED

Thomas Picot·Clément Raphin·Marcel Kern·Pierre-Antoine Bourdel·Théo Ahamdach·Jakob Reichel·Romain Long
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Abstract

A central challenge for cavity-QED-based quantum technologies is to make high-cooperativity optical interfaces compatible with site-resolved arrays of single atoms. Here, we demonstrate optical tweezer arrays of individual $^{87}$Rb atoms inside a fiber Fabry-Perot microcavity with single-atom cooperativity $\mathcal{C} \sim 90$. We combine background-free site-resolved fluorescence imaging of extended arrays with collective coupling to a common cavity mode for arrays with a mean atom number up to $\bar{N} \simeq 36$. These results establish a high-cooperativity platform for many-body cavity-QED with site-resolved detection and control.

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Thomas Picot, Clément Raphin, Marcel Kern, Pierre-Antoine Bourdel, Théo Ahamdach, Jakob Reichel, Romain Long. 2026-07-23. Extended Single-Atom Tweezer Arrays in High-Cooperativity Cavity-QED. https://arxiv.org/abs/2607.21515

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