High-fidelity indirect readout of trapped-ion hyperfine qubits

Stephen D. Erickson, Jenny J. Wu, Pan-Yu Hou +8

We propose and demonstrate a protocol for high-fidelity indirect readout of trapped ion hyperfine qubits, where the state of a ${}^9{\text{Be}}^{+}$ qubit ion is mapped to a $^{25}\text{…