A prototype interface between neutral-atom quantum processors and superconducting circuits

中性原子量子处理器和超导电路之间的原型接口

• 批准号: EP/Y022688/1
• 负责人: Stephen Hogan
• 金额: $ 129.06万
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY022688%2F1
• 关键词: prototype; interface; between; neutral; atom

Major advances have occurred in the development of new approaches to quantum computing over the last 5 years. Perhaps the most significant of these is an approach that uses individual atoms as qubits, that can be positioned in arbitrary three-dimensional geometries using tightly-focussed laser beams known as optical tweezers. Interactions between these qubits can be turned on and off at will, by exciting them in a controlled way with additional lasers to quantum states very close to their ionisation limits. These states are known as Rydberg states and their extreme properties, and the strong interactions between atoms excited to them, have been key to the rapid recent advances in the development of this type of neutral-atom quantum processor. Neutral-atom quantum processors have been implemented with in up to 200 qubits to solve problems of interest to condensed matter physicists and materials scientists, and possibilities exist to move beyond this limit to perform more complex quantum computations. However, there is also a strong motivation to develop techniques to network spatially separated neutral-atom processors, or to link them to other quantum computing platforms. Through this project, we will develop and demonstrate a prototype quantum interface of this kind. This will be achieved by implementing a quantum link between small numbers of helium atoms in optical tweezers, and superconducting electrical circuits through the controlled transfer of individual microwave photons from one to the other. The experimental tools developed and refined through this work, will provide a path toward the realisation of every larger and more complex quantum processors, with different components optimised for distinct computational tasks.

在过去的5年中，开发了量子计算的新方法，已经取得了重大进展。也许其中最重要的是一种使用单个原子作为量子的方法，可以使用被称为光学镊子的紧密聚焦激光束以任意的三维几何形式定位。通过以受控的方式激发这些量子位之间的相互作用，可以随意打开和关闭它们，并以其他激光向非常接近其电离限制的量子状态进行激发。这些状态被称为rydberg状态及其极端特性，而与它们激发的原子之间的强烈相互作用一直是这种中性原子量子处理器发展的最新进展的关键。中性原子量子处理器已在多达200 QUBIT中实施，以解决凝聚态物理学家和材料科学家感兴趣的问题，并且存在超出此限制以执行更复杂的量子计算的可能性。但是，也有强大的动机来开发技术以空间分离的中性原子处理器或将其链接到其他量子计算平台。通过这个项目，我们将开发并演示此类原型量子接口。这将通过在光学镊子中的少量氦原子之间实现量子联系，并通过单个微波光子从一个到另一个的受控转移通过受控的传递来实现电路。通过这项工作开发和完善的实验工具将为实现每个较大，更复杂的量子处理器的实现提供途径，并针对不同的计算任务进行了优化的不同组件。