High-Fidelity Single-Qubit Gates for Two-Electron Spin Qubits in GaAs

2014/04/30 by Pascal Cerfontaine, Tim Botzem, David P. DiVincenzo +1 · 2 citations
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Computer science #Excited state #Noise (video) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum and electron transport phenomena #Quantum computer #Quantum decoherence #Quantum dot #Quantum error correction #Quantum gate #Quantum mechanics #Qubit #Singlet state #Spin (aerodynamics) #quant-ph

paper · pdf · doi:10.1103/physrevlett.113.150501

published as Physical Review Letters 113, 150501 (2014) · 5 pages, 4 figures

openalex publication_date 2014/10/07 · arxiv created 2021/01/22 · arxiv updated 2021/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Single-qubit operations on singlet-triplet qubits in GaAs double quantum dots have not yet reached the fidelities required for fault-tolerant quantum information processing. Considering experimentally important constraints and using measured noise spectra, we numerically minimize the effect of decoherence (including high-frequency 1/f-like noise) and show, theoretically, that quantum gates with fidelities higher than 99.9% are achievable. We also present a self-consistent tuning protocol which should allow the elimination of individual systematic gate errors directly in an experiment.

Citations

• NMR techniques for quantum control and computation
• Universal Quantum Computation with Spin-1/2Pairs and Heisenberg Exchange
• A simple formula for the average gate fidelity of a quantum dynamical operation
• How to enhance dephasing time in superconducting qubits
• Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum Dots
• Singlet-triplet splitting in double quantum dots due to spin-orbit and hyperfine interactions
• Randomized Benchmarking and Process Tomography for Gate Errors in a Solid-State Qubit
• Fast sensing of double-dot charge arrangement and spin state with a radio-frequency sensor quantum dot
• Fidelity of single qubit maps

Cited by

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