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arXiv · 2608.13646

Dual-species alkali and alkaline-earth-like optical tweezer arrays via interferometrically aligned high-NA objectives

K. Weber·M. McMaster·M. Anderson·J. Tu·S. E. Eustice·N. A. Schine·I. B. Spielman·J. V. Porto·S. L. Rolston·S. Subhankar
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Abstract

We have developed a dual-species optical tweezer array apparatus combining $^{87}\text{Rb}$ and $^{174}\text{Yb}$ atoms with a permanent hybrid Twyman-Green--Fizeau interferometer, which provides precision co-alignment of two opposing 0.6-numerical aperture (NA) objectives and the high NA beams that pass through the system. This technique is extensible to other tweezer platforms operating at high numerical aperture across widely-separated wavelengths. Here we present simultaneous trapping and single-site resolved imaging of both species in co-aligned tweezer arrays with $^{87}\text{Rb}$ confined at $840\ \rm{nm}$ and $^{174}\text{Yb}$ at $532\ \rm{nm}$. The platform provides a foundation for hybrid quantum register operation, including mid-circuit measurements and asymmetric intra- and inter-species interactions, greatly expanding the capabilities of neutral atom arrays.

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K. Weber, M. McMaster, M. Anderson, J. Tu, S. E. Eustice, N. A. Schine, I. B. Spielman, J. V. Porto, S. L. Rolston, S. Subhankar. 2026-08-13. Dual-species alkali and alkaline-earth-like optical tweezer arrays via interferometrically aligned high-NA objectives. https://arxiv.org/abs/2608.13646

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