QuICHE: Quantum information and communication with high-dimensional encoding

QuICHE：高维编码的量子信息与通信

• 批准号: EP/T027177/1
• 负责人: Ian Walmsley
• 金额: $ 32.32万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FT027177%2F1
• 关键词: QuICHE; Quantum; information; communication; dimensional

High-dimensional (HD) photonic quantum information (QI) promises considerable advantages compared to the two-dimensional qubit paradigm, from increased quantum communication rates to increased robustness for entanglement distribution. This project aims to unlock the potential of HD QI by encoding information in the spectral-temporal (ST) degrees of freedom of light. We will develop matched experimental tools and theoretical architectures for manipulating and characterizing such states, and we will demonstrate their use in applications. Every light beam has a large capacity for information coding in its ST degrees of freedom, which, through broadband optical fiber communications, underpins the massive capacity of the internet. Quantum light beams inherit this capacity, which has been as-of-yet underexplored and underutilized. ST control of quantum states of light enables multiplexing of QI in a single spatial mode, ideally suited for guided-wave communications and integrated devices. QI encoding in HD states, going well beyond two-dimensional encoding, has been recognized as a promising way towards enhanced QI processing, communication, and sensing. Even with an increasing number of theoretical proposals, there are, however, few experimental demonstrations of this capability. What is needed is a unified theoretical approach to HD quantum states that is relevant to real experimental devices, accounting for real-world imperfections in order to unlock the full potential of ST-encoded HD QI processing. This project will deliver such a joint effort to bridge this gap. We will carry out connected theoretical and experimental research to achieve secure communication in bipartite and multipartite scenarios, enhance the performance of quantum networks, and develop efficient methods for dimension witnesses, entanglement certification, estimation of properties of quantum states and channels, and quantum metrology. Moreover, we will introduce and develop the new concept of HD quantum temporal imaging. Experimental implementation will be based on novel HD encodings in time and frequency based on ultrafast quantum optical approaches in nonlinear waveguide and electro-optic devices. Encodings using broadband field-orthogonal overlapping pulse modes as well as distinct, non-overlapping time and frequency bins will be explored and brought together to form an effective hybrid-encoded network. Key to experimentally accessing the HD potential of the ST encoding will be the noiseless manipulation of time scales using the concepts of quantum temporal imaging. Combined experimental and theoretical efforts will yield a unified platform for HD, integrated optical QI processing, communication, and sensing.

高维（HD）光子量子信息（QI）有望与二维Qubit范式相比，从量子通信率提高到纠缠分布的鲁棒性。该项目旨在通过编码光谱（ST）光自由度中的信息来释放HD QI的潜力。我们将开发匹配的实验工具和理论体系结构来操纵和表征此类状态，并将证明它们在应用中的使用。每个光束都具有其自由程度的信息编码的庞大能力，通过宽带光纤通信，它为互联网的巨大容量提供了支持。量子光束继承了这种能力，该容量尚未被解散和未充分利用。量子态的ST控制可以在单个空间模式下对Qi的多路复用，非常适合用于指导波的通信和集成设备。在高清状态下编码的Qi远远超出了二维编码，已被认为是增强QI处理，通信和感测的有前途的方法。即使有越来越多的理论提议，这种能力的实验证明很少。需要的是与实际实验设备相关的HD量子状态的统一理论方法，该方法考虑了现实世界中的缺陷，以解锁ST编码的HD QI处理的全部潜力。该项目将为弥合这一差距提供如此共同的努力。我们将进行连接的理论和实验研究，以实现在两分和多部分方案中的安全沟通，增强量子网络的性能，并为维度证人，纠缠认证，量子状态和通道的性质估算以及量子元学的有效方法开发有效的方法。此外，我们将介绍并发展HD量子时间成像的新概念。实验实现将基于基于非线性波导和电磁设备中超快量子光学方法的时间和频率的新型HD编码。将探索并结合使用宽带场 - 正交重叠脉冲模式以及不同的，非重叠的时间和频率箱的编码，并将其组合在一起以形成有效的混合编码网络。实验访问ST编码的HD电位的关键是使用量子时间成像的概念对时间尺度进行无声操纵。合并的实验和理论工作将产生一个统一的HD，集成的光学QI处理，通信和传感的平台。

项目成果

Quantum simulations with multiphoton Fock states

• DOI: 10.1038/s41534-021-00427-w
• 发表时间: 2019-06
• 期刊: npj Quantum Information
• 影响因子: 7.6
• 作者: T. Sturges;T. McDermott;A. Buraczewski;W. Clements;J. Renema;S. Nam;T. Gerrits;A. Lita;W. Kolthammer;A. Eckstein;I. Walmsley;M. Stobi'nska

Reducing g(2)(0) of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors.

• DOI: 10.1364/oe.450172
• 发表时间: 2021-11
• 期刊: Optics express
• 影响因子: 3.8
• 作者: S. Sempere-Llagostera;G. Thekkadath;R. Patel;W. Kolthammer;I. Walmsley

Single-shot discrimination of coherent states beyond the standard quantum limit.

超出标准量子极限的相干态的单次辨别。

• DOI: 10.1364/ol.421646
• 发表时间: 2021
• 期刊: Optics letters
• 影响因子: 3.6
• 作者: Thekkadath GS

Entangled resource for interfacing single- and dual-rail optical qubits

• DOI: 10.22331/q-2021-03-23-416
• 发表时间: 2021-03-23
• 期刊: QUANTUM
• 影响因子: 6.4
• 作者: Drahi, David;Sychev, Demid, V;Lvovsky, A., I
• 通讯作者: Lvovsky, A., I

Engineering a noise-free quantum memory for temporal mode manipulation

设计用于时间模式操作的无噪声量子存储器

• 发表时间: 2021
• 作者: Hird Thomas Muir