Randomized benchmarking and process tomography for gate errors in a solid-state qubit

2008/11/26 by Jerry M. Chow, J. M. Chow, J. M. Gambetta +13 · 8 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.supr-con #quant-ph

paper · pdf · doi:10.1103/physrevlett.102.090502

published as Phys. Rev. Lett. 102, 090502 (2009) · 4 pages, 4 figures, plus supplementary material

arxiv created 2008/11/26 · openalex publication_date 2009/03/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 pi 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.

Citations

• A simple formula for the average gate fidelity of a quantum dynamical operation
• Cavity quantum electrodynamics for superconducting electrical circuits: An architecture for quantum computation
• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• Coupling superconducting qubits via a cavity bus

Cited by

• Realization of Deterministic Quantum Teleportation with Solid State Qubits
• Digital quantum simulation of spin models with circuit quantum electrodynamics
• Entanglement Metrology Using a Joint Readout of Superconducting Qubits
• Entanglement degradation in the solid state: Interplay of adiabatic and quantum noise
• Scalable and Robust Randomized Benchmarking of Quantum Processes
• Simple Pulses for Elimination of Leakage in Weakly Nonlinear Qubits
• Fast reset and suppressing spontaneous emission of a superconducting qubit
• Jerry M. Chow [wikipedia]