Helios: A 98-qubit trapped-ion quantum computer

• URL: http://arxiv.org/abs/2511.05465v1
• Date: Fri, 07 Nov 2025 18:09:25 GMT
• Title: Helios: A 98-qubit trapped-ion quantum computer
• Abstract summary: Quantinuum Helios is a 98-qubit trapped-ion quantum processor.<n>Averaged over all operational zones in the system, we achieve average infidelities of $2.5(1)times10-5$ for single-qubit gates.
• Score: 20.939330724602353
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features $^{137}$Ba$^{+}$ hyperfine qubits, all-to-all connectivity enabled by a rotatable ion storage ring connecting two quantum operation regions by a junction, speed improvements from parallelized operations, and a new software stack with real-time compilation of dynamic programs. Averaged over all operational zones in the system, we achieve average infidelities of $2.5(1)\times10^{-5}$ for single-qubit gates, $7.9(2)\times10^{-4}$ for two-qubit gates, and $4.8(6)\times10^{-4}$ for state preparation and measurement, none of which are fundamentally limited and likely able to be improved. These component infidelities are predictive of system-level performance in both random Clifford circuits and random circuit sampling, the latter demonstrating that Helios operates well beyond the reach of classical simulation and establishes a new frontier of fidelity and complexity for quantum computers.

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