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arXiv · 2609.11730

An exchange-assisted entangling gate between 87Rb and 171Yb Rydberg atoms

Han Wang·Erdong Huang·Mingrui Jing·Hongshun Yao·Xin Wang·Jinguo Liu
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Abstract

Neutral-atom tweezer arrays support scalable quantum information processing. Dual-species $^{87}\mathrm{Rb}$--$^{171}\mathrm{Yb}$ arrays combine long-lived ytterbium nuclear-spin data qubits with fast, species-selective rubidium ancilla control and readout. However, realizing interspecies gates without inducing destructive Stark mixing in divalent atoms remains an outstanding problem. Here, we identify an optically accessible $S{+}S\leftrightarrow P{+}P$ F\"orster resonance at zero electric field, providing strong dipole-dipole exchange at array pitch. Using a shaped optical pulse under finite control response, we demonstrate a $0.36\,\mu\mathrm{s}$ exchange-assisted controlled-$Z$ gate with an intrinsic fidelity of $99.91\%$, remaining above $99.85\%$ under bounded perturbations. We also identify an auxiliary repulsive van der Waals channel, providing a comprehensive toolbox for hybrid quantum processors.

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Han Wang, Erdong Huang, Mingrui Jing, Hongshun Yao, Xin Wang, Jinguo Liu. 2026-09-10. An exchange-assisted entangling gate between 87Rb and 171Yb Rydberg atoms. https://arxiv.org/abs/2609.11730

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