High-Fidelity, Single-Shot, Quantum-Logic-Assisted Readout in a Mixed-Species Ion Chain

Colin Bruzewicz, Robert McConnell, Jonathon Sedlacek +4

We use a co-trapped ion (${}^{88}{\mathrm{Sr}}^{+}$) to sympathetically cool and measure the quantum state populations of a memory-qubit ion of a different atomic species ($^{40}\mathr…