Protection of quantum information in small clusters of qubits

保护小量子位簇中的量子信息

• 批准号: EP/Z000572/1
• 负责人: Marzena Szymanska
• 金额: $ 26.91万
• 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%2FZ000572%2F1
• 关键词: Protection; quantum; information; small; clusters

Modern digital electronics has reached an important junction. The traditional way of delivering ever stronger computing power by simple miniaturisation is no longer possible. One potential avenue for future electronics lies in Quantum Computing which can potentially deliver enormous computational power for certain tasks. Over the last decade, improvements in the materials, design and new architectures for realising qubits have led to an impressive increase of their coherence time. Yet, further improving coherence is imperative to achieving a fault tolerant quantum processor. We propose an approach to enhance qubit coherence by orders of magnitude, based on storing quantum information in the lowest energy states of short qubit chains. This encoding is protected from major sources of decoherence due to a high degree of spatial symmetry supported by long range interactions. In this project we will apply these principles to both Rydberg atoms and superconducting circuits which are architectures that have the required properties to support this approach. The project will also develop protocols to couple, control, readout and benchmark the qubits. Finally, this project aims to reach a level of technological maturity such that this approach will have near term applications in today's quantum computing industry.

现代数字电子技术已经到达一个重要的十字路口。通过简单的小型化来提供更强大的计算能力的传统方式已不再可能。未来电子产品的一个潜在途径在于量子计算，它可以为某些任务提供巨大的计算能力。在过去的十年中，用于实现量子位的材料、设计和新架构的改进导致其相干时间显着增加。然而，为了实现容错量子处理器，进一步提高一致性至关重要。我们提出了一种基于将量子信息存储在短量子位链的最低能量状态的基础上，将量子位相干性增强几个数量级的方法。由于长距离相互作用支持高度的空间对称性，这种编码可以免受主要退相干源的影响。在这个项目中，我们将把这些原理应用于里德伯原子和超导电路，这些架构具有支持这种方法所需的属性。该项目还将开发用于耦合、控制、读出和基准测试量子位的协议。最后，该项目的目标是达到一定的技术成熟度，以便该方法能够在当今的量子计算行业中得到短期应用。