Benchmarking a High-Fidelity Mixed-Species Entangling Gate
Benchmarking a High-Fidelity Mixed-Species Entangling Gate
We implement a two-qubit logic gate between a Ca43+ hyperfine qubit and a Sr88+ Zeeman qubit. For this pair of ion species, the S–P optical transitions are close enough that a single laser of wavelength 402 nm can be used to drive the gate but sufficiently well separated to give …