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Trapped Ion Quantum Computing

Trapped-ion two-qubit gates with >99.99% fidelity without ground-state cooling

arXiv
Authors: A. C. Hughes, R. Srinivas, C. M. Löschnauer, H. M. Knaack, R. Matt, C. J. Ballance, M. Malinowski, T. P. Harty, R. T. Sutherland

Year

2025

Paper ID

51003

Status

Preprint

Abstract Read

~2 min

Abstract Words

88

Citations

N/A

Abstract

We introduce the 'smooth gate', an entangling method for trapped-ion qubits where residual spin-motion entanglement errors are adiabatically eliminated by ramping the gate detuning. We demonstrate electronically controlled two-qubit gates with an estimated error of 8.4(7)times10-5 without ground-state cooling. We further show that the error remains lesssim 5times10-4 for ions with average phonon occupation up to bar{n}=9.4(3) on the gate mode. These results indicate that trapped-ion quantum computation can achieve high fidelity at temperatures above the Doppler limit, which enables faster and simpler device operation.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • We introduce the 'smooth gate', an entangling method for trapped-ion qubits where residual spin-motion entanglement errors are adiabatically eliminated by ramping the gate...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2510.17286 [2] arXiv https://arxiv.org/abs/2510.17286 [3] Publisher https://arxiv.org/abs/2510.17286

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