Ytterbium Nuclear-Spin Qubits in an Optical Tweezer Array

We report on the realization of a fast, scalable, and high-fidelity qubit architecture, based Yb171 atoms in an optical tweezer array. demonstrate several attractive properties this atom for its use as building block quantum information processing platform. Its nuclear spin 1/2 serves long-lived coherent two-level system, while rich, alkaline-earth-like electronic structure allows low-entropy preparation, fast control, readout. present near-deterministic loading protocol, which us to fill 10×10 array with 92.73(8)% efficiency single 96.0(1.4)% efficiency. In future, protocol will enable efficient uniform target arrays high probability, essential step simulation applications. Employing robust approach, we perform submicrosecond rotations characterize their fidelity through randomized benchmarking, yielding 5.2(5)×10−3 error per Clifford gate. For memory applications, measure coherence our qubits T2*=3.7(4) s T2=7.9(4) s, many orders magnitude longer than rotation pulses. depolarization times order tens seconds find that can be increased 100 scale application several-gauss magnetic field. Finally, 3D Raman-sideband cooling bring near motional ground state, central future implementations two-qubit gates benefit from low entropy.6 MoreReceived 13 December 2021Accepted 8 April 2022DOI:https://doi.org/10.1103/PhysRevX.12.021027Published by American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution work must maintain attribution author(s) published article’s title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasAtomic, & lattice clocksQuantum gatesQuantum processingQuantum InformationAtomic, Molecular Optical