Materials World Network: Spin Entanglement Using Transient Electrons in C and Si-Based Materials

该奖项支持多学科国际合作，以研究和教育解决产生、控制和测量量子纠缠的挑战。纠缠是量子力学中出现的最深刻的概念之一，它引起了物理系统状态之间的相关性，甚至是广泛分离的系统。量子纠缠及其保存是量子传感、量子中继器和量子计算等新技术的基础。这项合作包括实验和理论工作，合作者包括牛津大学、英国赫瑞瓦特大学和普林斯顿大学的研究人员。该项目的长期目标是了解如何利用瞬态电子自旋来介导多个核自旋之间的量子纠缠。这项工作解决了各种凝聚态系统中与自旋退相干相关的长期问题，并探索了有关纠缠态演化和破坏的新未知领域。碳基和硅基材料和器件将使用电子顺磁共振（EPR），电子-核双共振（ENDOR）和电探测磁共振（EDMR）技术进行研究。当电子自旋与附近的核自旋纠缠后，电子将被移动到它们可以与一组新的原子核相互作用的地方。用这些方法来纠缠广泛分离的核自旋是可能的。将讨论与电子的移除和重新引入相关的相干性损失问题，以及电子运动过程中可能出现的相干性损失。这个项目建立在高级研究人员之间非常成功的合作基础上，尽管这种合作在很大程度上是非正式的，这种合作已经存在了几年。这项工作直接解决了基础科学和应用科学之间的关键问题，在新兴的量子信息领域具有重要的直接应用。与此项目相关的学生将受益于网络中合作机构之间的思想、信息和人员的无缝流动。牛津大学和赫瑞瓦特大学的研究小组计划与普林斯顿大学的研究小组经常交换学生和博士后。这些交流将使研究人员能够利用合作机构的互补实验设备和理论专业知识。正是这种跨学科的国际培训对新一代的设备工程师和科学家来说非常重要。

This award supports a multidisciplinary international collaboration for research and education addressing the challenge of producing, controlling, and measuring quantum entanglement. Entanglement is one of the most profound concepts to emerge from quantum mechanics, giving rise to correlations between the states of physical systems, even widely separated ones. Entanglement and its preservation underlie new technologies such as quantum sensing, quantum repeaters, and quantum computation. This collaboration includes both experimental and theoretical work, with researchers at Oxford University and Heriot-Watt University in the United Kingdom, and Princeton University. The long-term goal of the project is to understand how transient electron spins can be used to mediate quantum entanglement between multiple nuclear spins. The work addresses long-standing questions related to spin decoherence in various condensed matter systems, and explores new uncharted territory concerning the evolution and destruction of entangled states. Both carbon- and silicon-based materials and devices will be studied, using Electron Paramagnetic Resonance (EPR), Electron-Nuclear Double Resonance (ENDOR), and Electrically Detected Magnetic Resonance (EDMR) techniques. After electron spins are entangled with nuclear spins in their immediate vicinity, the electrons will be moved to where they can interact with a new set of nuclei. It may be possible to entangle widely separated nuclear spins with these methods. Questions concerning the loss of coherence associated with the removal and reintroduction of the electrons will be addressed, as well as the possible loss of coherence during the electrons' motion. This project builds upon a highly successful though largely informal collaboration amongst the senior researchers which has existed for several years. The work directly addresses key questions at the interface between fundamental and applied science, with important immediate applications in the emerging field of quantum information. The students associated with this project will benefit from the seamless flow of ideas, information, and people between the partner institutions in the network. Frequent exchange of students and postdocs between the groups at Oxford and Heriot-Watt with the Princeton group are planned. These exchanges will allow the researchers to take advantage of complementary experimental equipment and theoretical expertise at the partner institutions. It is this kind of cross-disciplinary international training which will be important for a new generation of device engineers and scientists.