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arXiv · 2401.02308

Interspecies F\"orster resonances of Rb-Cs Rydberg $d$-states for enhanced multi-qubit gate fidelities

Paul M. Ireland·D. M. Walker·J. D. Pritchard
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Abstract

We present an analysis of interspecies interactions between Rydberg $d$-states of rubidium and cesium. We identify the F\"orster resonance channels offering the strongest interspecies couplings, demonstrating the viability for performing high-fidelity two- and multi-qubit $C_kZ$ gates up to $k=4$, including accounting for blockade errors evaluated via numerical diagonalization of the pair-potentials. Our results show $d$-state orbitals offer enhanced suppression of intraspecies couplings compared to $s$-states, making them well suited for use in large-scale neutral atom quantum processors.

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Paul M. Ireland, D. M. Walker, J. D. Pritchard. 2024-01-04. Interspecies F\"orster resonances of Rb-Cs Rydberg $d$-states for enhanced multi-qubit gate fidelities. https://doi.org/10.1103/physrevresearch.6.013293

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