High-fidelity entanglement and detection of alkaline-earth Rydberg atoms

By I. Madjarov, J. Covey, Adam L. Shaw, Joonhee Choi, Anant Kale, Alexandre Cooper, Hannes Pichler, V. Schkolnik, Jason R. Williams, M. Endres. Nature Physics, 2020

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Quantum simulation and computing with Rydberg-interacting qubits (2020, methodology): “…remarkable progress, including: the assembly of tweezer arrays with on the order of 100 sites deterministically ﬁlled with single atoms 35–38 or small atomic ensembles 39 that can serve as Rydberg qubits; high-ﬁdelity state resolved readout 40,41 ; high-ﬁdelity entangling operations with F > 0 .”
Ytterbium Nuclear-Spin Qubits in an Optical Tweezer Array (2021, background): “Moreover, it can be paired with long-lived electronic degrees of freedom for novel readout and two-qubit gate schemes [18, 19].”
Quantum computing with neutral atoms (2020, background): “In atomic registers they have been observed with an extremely high contrast [17, 18], corresponding to single-qubit gate fidelities F higher than 99.”
Quantum error mitigation (2022, background): “…see reports of experiments demonstrating high-quality control over multiple qubits [see e.g. Asavanant et al. (2019); Ebadi et al. (2021); Jurcevic et al. (2021); Madjarov et al. (2020); and Xue et al. (2022)], some even reaching beyond 50 qubits [see e.g. Arute et al. (2019) and Wu et al. (2021)].”