Universal gate operations on nuclear spin qubits in an optical tweezer array of ${}^{171}$Yb atoms

Abstract

Neutral atom arrays are a rapidly developing platform for quantum science. In this work, we demonstrate a universal set of quantum gate operations on a new type of neutral atom qubit: a nuclear spin in an alkaline earth-like atom (AEA), ${}^{171}$Yb. We present techniques for cooling, trapping and imaging using a newly discovered magic trapping wavelength at $\lambda =486.78$ nm. We implement qubit initialization, readout, and single-qubit gates, and observe long qubit lifetimes, $T_1\approx 20$ s and $T_2^{\ast }=1.24(5)$ s, and a single-qubit operation fidelity ${\mathcal{F}}_{1Q}=0.99959(6)$. We also demonstrate two-qubit entangling gates using the Rydberg blockade, as well as coherent control of these gate operations using light shifts on the Yb${}^{+}$ ion core transition at 369 nm. These results are a significant step towards highly coherent quantum gates in AEA tweezer arrays.

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• Continuous operation of large-scale atom arrays in optical lattices
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• Optimizing Rydberg Gates for Logical Qubit Performance
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• Parallel assembly of arbitrary defect-free atom arrays with a multi-tweezer algorithm
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• The ${}^1{\mathrm{S}}_0$-${}^3{\mathrm{P}}_2$ magnetic quadrupole transition in neutral strontium
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• High-fidelity and robust controlled-Z gates implemented with Rydberg atoms via echoing rapid adiabatic passage
• Engineering the Kondo impurity problem with alkaline-earth atom arrays
• Resource Analysis of Low-Overhead Transversal Architectures for Reconfigurable Atom Arrays
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• Efficient generation of multiqubit entanglement states using rapid adiabatic passage
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• Quantum Non-Demolition Measurement on the Spin Precession of Laser-Trapped ${}^{171}$Yb Atoms
• Coherence-preserving cooling of nuclear spin qubits in a weak magnetic field
• Robust phase-controlled gates for scalable atomic quantum processors using optical standing waves
• Nuclear Electric Resonance for Spatially-Resolved Spin Control via Pulsed Optical Excitation in the UV-Visible Spectrum
• Local vs non-local dynamics in cavity-coupled Rydberg atom arrays
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• Two-photon cooling of calcium atoms
• An efficient high-current circuit for fast radio-frequency spectroscopy in cold atomic gases
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• Autoionization-enhanced Rydberg dressing by fast contaminant removal
• Determining the ${}^3$P${}_0$ excited-state tune-out wavelength of ${}^{174}$Yb in a triple-magic lattice
• Optical nuclear electric resonance as single qubit gate for trapped neutral atoms
• Single-atom imaging of ${}^{173}$Yb in optical tweezers loaded by a five-beam magneto-optical trap
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