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In situ rewiring of two-dimensional ion lattice interactions using metastable state shelving

Ilyoung Jung1, Antonis Kyprianidis2, Frank G. Schroer1, Thomas W. Burkle1, Jack Lyons1, and Philip Richerme1,3

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Phys. Rev. A 114, 022425 – Published 12 August, 2026

DOI: https://doi.org/10.1103/9kn5-b2vt

Abstract

Trapped-ion lattice geometries, which determine the interactions between trapped-ion qubits, are typically governed by the balance of Coulomb repulsion forces with the external trapping potential. Here we demonstrate how the effective ion lattice geometry and resulting qubit-qubit interactions may be reconfigured in situ, by shelving specific ions in metastable states outside the qubit subspace. Using a triangular lattice of three Yb+171 ions, we optically pump selected ions into the long-lived F7/22 state. We then apply a global Ising-like Hamiltonian to the system and verify that the shelved qubits are fully removed from participation in the quantum dynamics. We characterize the metastable state lifetime in the presence of laser-driven ion-ion interactions, finding a deshelving rate that is orders of magnitude slower than the spin-spin interaction rate and scales quadratically with applied laser intensity.

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Phys. Rev. A 114, 022425– Published 12 August, 2026
  • Received 10 February 2026
  • Accepted 23 July 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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