High-fidelity universal gates in the $^{171}$Yb ground state nuclear spin qubit
Abstract
Arrays of optically trapped neutral atoms are a promising architecture for the realization of quantum computers. In order to run increasingly complex algorithms, it is advantageous to demonstrate high-fidelity and flexible gates between long-lived and highly coherent qubit states. In this work, we demonstrate a universal high-fidelity gate-set with individually controlled and parallel application of single-qubit gates and two-qubit gates operating on the ground-state nuclear spin qubit in arrays of tweezer-trapped Yb atoms. We utilize the long lifetime, flexible control, and high physical fidelity of our system to characterize native gates using single and two-qubit Clifford and symmetric subspace randomized benchmarking circuits with more than 200 CZ gates applied to one or two pairs of atoms. We measure our two-qubit entangling gate fidelity to be 99.72(3)% (99.40(3)%) with (without) post-selection. In addition, we introduce a simple and optimized method for calibration of multi-parameter quantum gates. These results represent important milestones towards executing complex and general quantum computation with neutral atoms.
Cite
@article{arxiv.2411.11708,
title = {High-fidelity universal gates in the $^{171}$Yb ground state nuclear spin qubit},
author = {J. A. Muniz and M. Stone and D. T. Stack and M. Jaffe and J. M. Kindem and L. Wadleigh and E. Zalys-Geller and X. Zhang and C. -A. Chen and M. A. Norcia and J. Epstein and E. Halperin and F. Hummel and T. Wilkason and M. Li and K. Barnes and P. Battaglino and T. C. Bohdanowicz and G. Booth and A. Brown and M. O. Brown and W. B. Cairncross and K. Cassella and R. Coxe and D. Crow and M. Feldkamp and C. Griger and A. Heinz and A. M. W. Jones and H. Kim and J. King and K. Kotru and J. Lauigan and J. Marjanovic and E. Megidish and M. Meredith and M. McDonald and R. Morshead and S. Narayanaswami and C. Nishiguchi and T. Paule and K. A. Pawlak and K. L. Pudenz and D. Rodríguez Pérez and A. Ryou and J. Simon and A. Smull and M. Urbanek and R. J. M. van de Veerdonk and Z. Vendeiro and T. -Y. Wu and X. Xie and B. J. Bloom},
journal= {arXiv preprint arXiv:2411.11708},
year = {2024}
}