Scalable, high-fidelity all-electronic control of trapped-ion qubits

Abstract

The central challenge of quantum computing is implementing high-fidelity quantum gates at scale. However, many existing approaches to qubit control suffer from a scale-performance trade-off, impeding progress towards the creation of useful devices. Here, we present a vision for an electronically controlled trapped-ion quantum computer that alleviates this bottleneck. Our architecture utilizes shared current-carrying traces and local tuning electrodes in a microfabricated chip to perform quantum gates with low noise and crosstalk regardless of device size. To verify our approach, we experimentally demonstrate low-noise site-selective single- and two-qubit gates in a seven-zone ion trap that can control up to 10 qubits. We implement electronic single-qubit gates with 99.99916(7)% fidelity, and demonstrate consistent performance with low crosstalk across the device. We also electronically generate two-qubit maximally entangled states with 99.97(1)% fidelity and long-term stable performance over continuous system operation. These state-of-the-art results validate the path to directly scaling these techniques to large-scale quantum computers based on electronically controlled trapped-ion qubits.

References in corpus (31)

• Suppressing quantum errors by scaling a surface code logical qubit
• Logical quantum processor based on reconfigurable atom arrays
• Randomized Benchmarking of Quantum Gates
• Robust randomized benchmarking of quantum processes
• High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit
• A Race Track Trapped-Ion Quantum Processor
• Quantum critical dynamics in a 5000-qubit programmable spin glass
• Trapped-ion quantum logic gates based on oscillating magnetic fields
• Errors in trapped-ion quantum gates due to spontaneous photon scattering
• High-Fidelity Bell-State Preparation with ${}^{40}$Ca${}^{+}$ Optical Qubits
• High-fidelity trapped-ion quantum logic using near-field microwaves
• High-Fidelity, Frequency-Flexible Two-Qubit Fluxonium Gates with a Transmon Coupler
• Ion traps fabricated in a CMOS foundry
• Towards near-term quantum simulation of materials
• Transport quantum logic gates for trapped ions
• Ball-grid array architecture for microfabricated ion traps
• How to wire a 1000-qubit trapped ion quantum computer
• Microwave Near-Field Quantum Control of Trapped Ions
• Fast, high-fidelity addressed single-qubit gates using efficient composite pulse sequences
• Multi-site Integrated Optical Addressing of Trapped Ions
• High-fidelity trapped-ion qubit operations with scalable photonic modulators
• Transport of multispecies ion crystals through a junction in an RF Paul trap
• One- and two-qubit gate infidelities due to motional errors in trapped ions and electrons
• Photon scattering errors during stimulated Raman transitions in trapped-ion qubits
• Multi-zone trapped-ion qubit control in an integrated photonics QCCD device
• Grating design methodology for tailored free-space beam-forming
• Robust and fast microwave-driven quantum logic for trapped-ion qubits
• Coherent Control of Trapped Ion Qubits with Localized Electric Fields
• Optimizing the Electrical Interface for Large-Scale Color-Center Quantum Processors
• Individual addressing of trapped ion qubits with geometric phase gates
• Changes in electric-field noise due to thermal transformation of a surface ion trap

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