Universal Gate Operations on Nuclear Spin Qubits in an Optical Tweezer Array of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Yb</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>171</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> Atoms
Shuo Ma, A. P. Burgers, Genyue Liu, Jack T. Wilson, Bichen Zhang, Jeff D. Thompson
Abstract
Neutral atom arrays are a rapidly developing platform for quantum science. Recently, alkaline earth atoms (AEAs) have attracted interest because their unique level structure provides several opportunities for improved performance. In this work, we present the first demonstration of a universal set of quantum gate operations on a nuclear spin qubit in an AEA, using 171 Yb. We implement narrow-line cooling and imaging using a newly discovered magic trapping wavelength at 486.78 nm. We also demonstrate nuclear spin initialization, readout, and single-qubit gates and observe long coherence times [T 1 20 s and T 2 1.245 s] and a single-qubit operation fidelity F 1Q 0.999596. 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 toward highly coherent quantum gates in AEA tweezer arrays.