High-Fidelity Universal Gate Set for 9Be+ Ion Qubits

Summary

Demonstrates a high-fidelity universal gate set for ${}^9{\text{Be}}^{+}$ hyperfine qubits at NIST. Single-qubit gate error of $3.8(1)\times 10^{-5}$ (fidelity 99.9962%) and two-qubit gate error of $8(4)\times 10^{-4}$ (fidelity 99.92%) via Mølmer-Sørensen entangling gate. Bell state fidelity 99.924%. Memory coherence >1 s using clock-state encoding in a multi-segmented linear Paul trap.

Cited In

• beryllium-9-ion-qubit