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5年中，量子计算新方法的开发取得了重大进展。也许其中最重要的是一种使用单个原子作为量子位的方法，可以使用称为光镊的紧密聚焦激光束将其定位在任意三维几何形状中。这些量子比特之间的相互作用可以随意打开和关闭，通过以受控的方式用额外的激光将它们激发到非常接近其电离极限的量子状态。这些状态被称为里德伯态，它们的极端性质以及激发它们的原子之间的强相互作用是这种中性原子量子处理器最近发展迅速的关键。中性原子量子处理器已经实现了高达200个量子比特，以解决凝聚态物理学家和材料科学家感兴趣的问题，并且存在超越这一限制以执行更复杂量子计算的可能性。然而，还有一个强烈的动机是开发将空间分离的中性原子处理器网络化的技术，或者将它们连接到其他量子计算平台。通过这个项目，我们将开发和展示这种量子接口的原型。这将通过在光镊中的少量氦原子和超导电路之间实现量子链接来实现，通过控制单个微波光子从一个到另一个的转移。通过这项工作开发和完善的实验工具将为实现更大、更复杂的量子处理器提供一条道路，不同的组件将针对不同的计算任务进行优化。