Corpus ID: 220936640

# State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector

@article{Todaro2020StateRO,
title={State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector},
author={S. Todaro and V. B. Verma and K. C. McCormick and D. T. C. Allcock and R. Mirin and D. J. Wineland and S. W. Nam and A. C. Wilson and D. Leibfried and D. Slichter},
journal={arXiv: Quantum Physics},
year={2020}
}
• S. Todaro, +7 authors D. Slichter
• Published 2020
• Physics
• arXiv: Quantum Physics
• We report high-fidelity state readout of a trapped ion qubit using a trap-integrated photon detector. We determine the hyperfine qubit state of a single $^9$Be$^+$ ion held in a surface-electrode rf ion trap by counting state-dependent ion fluorescence photons with a superconducting nanowire single-photon detector (SNSPD) fabricated into the trap structure. The average readout fidelity is 0.9991(1), with a mean readout duration of 46 $\mu$s, and is limited by the polarization impurity of the… CONTINUE READING
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