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arXiv:2506.10919 · Nature

A cavity-array microscope for parallel single-atom interfacing

Adam L. Shaw, Anna Soper, Danial Shadmany, Aishwarya Kumar, Lukas Palm, Da-Yeon Koh, Vassilios Kaxiras, Lavanya Taneja, Matt Jaffe, David Schuster, Jonathan Simon

Published Jan 28, 2026• 10 citations
arXivHTMLPDF
DOI
10.1038/s41586-025-10035-9

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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^{87}87Rb atoms inside a fiber Fabry-Perot microcavity with single-atom cooperativity C∼90\mathcal{C} \sim 90C∼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 Nˉ≃36\bar{N} \simeq 36Nˉ≃36. These results establish a high-cooperativity platform for many-body cavity-QED with site-resolved detection and control.
Alkaline-earth tweezer arrays have emerged as a powerful technology for both quantum computing and sensing, due to several internal degrees of freedom for flexible error-correction, and optical clock transitions. Efficient and scalable coupling of single atoms in an array to single photons is a major outstanding challenge. With alkaline earth atoms, such an interface would enable error-correction and quantum networking of optical clocks. I will describe a new kind of macroscopic lens based optical resonator which can have wavelength scale mode waists, and thus strong coupling even at very low finesse. I will show how to make arrays of such resonators, naturally well-suited for coupling with atom arrays – in the context of our efforts to make “cavity-atom arrays” of Ytterbium, providing a scalable and parallel link to single photons, for error-corrected sensing, as well as networking of atomic clocks.