Fully integrated chip-based quantum computing

全集成芯片量子计算

• 批准号: 2750555
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2750555
• 关键词: Fully; integrated; chip; based; quantum

Trapped ions constitute near-perfect qubits with unrivalled quantum logic performance. Microfabricated "chip" traps are a promising avenue for scaling up to the large numbers of qubits required for future quantum computers. We previously made the first demonstration of a complete set of elementary qubit operations with high fidelity (above 99.5%) using chip traps [Harty et al., PRL 2014 and 2016], where the coherent qubit control was by performed by microwave electronic techniques. Our second-generation chip trap system, which operates at moderate cryogenic temperatures (10K-50K) to reduce noise, has the necessary performance to achieve logic gates with greater than 99.9% fidelity, at significantly faster speeds than our first-generation system. However, the optical control (still needed for qubit state prep and readout) is still provided by bulk optics, severely limiting the scalability of the technology.

捕获离子构成近乎完美的量子比特，具有无与伦比的量子逻辑性能。微制造“芯片”陷阱是一个很有前途的途径，可以扩大到未来量子计算机所需的大量量子比特。我们之前使用芯片陷阱首次演示了一套高保真度（99.5%以上）的基本量子位操作[Harty等人，PRL 2014和2016]，其中相干量子位控制是通过微波电子技术进行的。我们的第二代芯片陷阱系统在中等低温（10K-50K）下工作，以降低噪声，具有实现超过99.9%保真度的逻辑门的必要性能，速度明显快于我们的第一代系统。然而，光学控制（仍然需要量子比特状态准备和读出）仍然由大块光学器件提供，严重限制了该技术的可扩展性。