2015/06/15 by Alexandre M. Souza, Roberto S. Sarthour, R. S. Sarthour +3 · 10 citations
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Artificial intelligence #Computer science #Controlled NOT gate #Dephasing #Electronic engineering #Engineering #Fidelity #Limit (mathematics) #Mathematics #Noise (video) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum error correction #Quantum gate #Quantum mechanics #Telecommunications #quant-ph
paper · pdf · doi:10.1103/physreva.92.062332
published in Physical Review A 92(6) (American Physical Society)
arxiv created 2015/06/15 · openalex publication_date 2015/12/21 · arxiv updated 2015/12/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The implementation of quantum gates with fidelities that exceed the threshold for reliable quantum computing requires robust gates whose performance is not limited by the precision of the available control fields. The performance of these gates also should not be affected by the noisy environment of the quantum register. Here we use randomized benchmarking of quantum gate operations to compare the performance of different families of gates that compensate errors in the control field amplitudes and decouple the system from the environmental noise. We obtain average fidelities of up to 99.8%, which exceeds the threshold value for some quantum error correction schemes as well as the expected limit from the dephasing induced by the environment.