Engineering a Noiseless and Broadband Raman Quantum Memory for Temporal Mode Manipulation

设计用于时间模式操纵的无噪声宽带拉曼量子存储器

• 批准号: 2286083
• 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: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2286083
• 关键词: Engineering; Noiseless; Broadband; Raman; Quantum

Single-mode broadband quantum memories provide unique capabilities that can enhance and expand the performance of future quantum networks. On the one hand, they facilitate the temporally multiplexed production of pure single photons at high clock rates, which can dramatically increase photon generation rates. On the other hand, their single mode nature allows for operation as a broadband beam splitter that can operate on novel bases for information encoding. Their usefulness within quantum architectures hinges on the ability to both preserve and to retrieve the non-classicality of the input quantum state, thus requiring low-noise operation.This report details our recent progress in reducing the noise in the previously established Raman memory protocol via a novel method. By implementing this noise suppression scheme we are able to demonstrate the feasibility of retrieving a non-classical state following the storage of a single photon state, a thus-far impossibility in the standard Raman memory.This project falls under the EPSRC Quantum components theme.

单模宽带量子存储器提供了独特的功能，可以增强和扩展未来量子网络的性能。一方面，它们促进了在高时钟速率下纯单光子的时间复用产生，这可以显著提高光子产生速率。另一方面，它们的单模性质允许作为宽带分束器操作，该宽带分束器可以在用于信息编码的新颖基础上操作。它们在量子体系结构中的有用性取决于保持和恢复输入量子态的非经典性的能力，因此需要低噪声operation.This报告详细介绍了我们最近的进展，在以前建立的拉曼存储协议通过一种新的方法，以减少噪声。通过实施这种噪声抑制方案，我们能够证明在存储单光子状态后恢复非经典状态的可行性，这在标准拉曼存储器中是不可能的。