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

2026/07/23 by Thomas Picot, Clément Raphin, Marcel Kern +4
#quant-ph

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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 ⁸⁷Rb atoms inside a fiber Fabry-Perot microcavity with single-atom cooperativity C ∼ 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 N ≃ 36. These results establish a high-cooperativity platform for many-body cavity-QED with site-resolved detection and control.

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