Title: Scalable, high-fidelity all-electronic control of trapped-ion qubits Show Chinese title

Title: 可扩展的高保真全电子囚禁离子量子比特控制

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. Show Chinese abstract

Abstract: 量子计算的核心挑战是在大规模实现高保真量子门。然而，许多现有的量子比特控制方法都存在规模与性能之间的权衡问题，阻碍了实用设备的开发。在此，我们提出了一种电子控制的囚禁离子量子计算机的设计愿景，以缓解这一瓶颈。我们的架构利用在微加工芯片上的共享载流迹线和局部调节电极，在不管设备尺寸的情况下执行低噪声和串扰的量子门。为了验证我们的方法，我们在一个可以控制多达10个量子比特的七区域离子陷阱中实验演示了低噪声的单量子比特选择性门和两量子比特门。我们实现了电子单量子比特门，保真度达到99.99916(7)%，并在整个设备上展示了具有低串扰的一致性能。我们还通过电子生成了保真度为99.97(1)%的最大纠缠态，并在连续系统操作中展示了长期稳定性能。这些最先进的结果验证了直接将这些技术扩展到基于电子控制囚禁离子量子比特的大规模量子计算机的可行性。