Helios: A 98-qubit trapped-ion quantum computer

Summary

Describes Quantinuum’s Helios processor: a 98-qubit QCCD trapped-ion quantum computer using ${}^{137}{\text{Ba}}^{+}$ hyperfine data qubits with ${}^{171}{\text{Yb}}^{+}$ sympathetic cooling. Introduces a four-way X-junction architecture with a rotatable ion storage ring providing all-to-all connectivity. Achieves 1Q fidelity 99.9975% and 2Q fidelity 99.921%. Demonstrates up to 94 logical qubits with Iceberg error-correcting codes.

Cited In

• barium-137-ion-qubit