We present measurements of single-qubit gate errors for a superconducting qubit. Results from quantum process tomography and randomized benchmarking are compared with gate errors obtained from a double π pulse experiment. Randomized benchmarking reveals a minimum average gate error of 1.1±0.3% and a simple exponential dependence of fidelity on the number of gates. It shows that the limits on gate fidelity are primarily imposed by qubit decoherence, in agreement with theory.
|Original language||English (US)|
|Journal||Physical review letters|
|State||Published - Mar 2 2009|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)