Single-qubit gates with errors at the $10^{-7}$ level

M. C. Smith, A. D. Leu, K. Miyanishi +2

We report the achievement of single-qubit gates with sub-part-per-million error rates, in a trapped-ion ${}^{43}$Ca${}^{+}$ hyperfine clock qubit. We explore the speed/fidelity trade-o…