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.

与二维量子比特模式相比，高维(HD)光子量子信息(QI)具有显著的优势，从提高量子通信速率到提高纠缠分布的稳健性。这个项目旨在通过对光的光谱-时间(ST)自由度中的信息进行编码来释放HD QI的潜力。我们将开发相匹配的实验工具和理论架构来操纵和表征这种状态，并将演示它们在应用中的使用。每束光束在其ST个自由度内都有很大的信息编码容量，通过宽带光纤通信，支撑了互联网的巨大容量。量子光束继承了这种能力，到目前为止，这种能力还没有得到充分开发和利用。ST对光的量子态的控制使QI能够以单一的空间模式进行多路复用，非常适合于导波通信和集成设备。高清状态下的QI编码，远远超出了二维编码，已被认为是增强QI处理、通信和感知的一种有前途的方式。然而，即使有越来越多的理论建议，关于这种能力的实验演示也很少。需要的是一种与真实实验设备相关的HD量子态的统一理论方法，考虑到现实世界的缺陷，以便释放ST编码的HD QI处理的全部潜力。该项目将为弥合这一差距做出这样的共同努力。我们将开展理论和实验相结合的研究，实现两方和多方场景下的安全通信，提升量子网络的性能，开发高效的量纲证明、纠缠验证、量子态和量子通道性质估计、量子计量学方法。此外，我们还将引入和发展HD量子时间成像的新概念。实验实现将基于基于超快量子光学方法的时间和频率上的新型HD编码，用于非线性光波导和电光器件。将探索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桶的编码，并将其结合在一起以形成有效的混合编码网络。实验上获取ST编码的HD势的关键将是使用量子时间成像的概念对时间尺度进行无声操作。实验和理论的结合将为高清、集成的光学QI处理、通信和传感提供一个统一的平台。

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

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

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

Further compactifying linear optical unitaries

• DOI: 10.1063/5.0053421
• 发表时间: 2021-07-01
• 期刊: APL PHOTONICS
• 影响因子: 5.6
• 作者: Bell, B. A.;Walmsley, I. A.
• 通讯作者: Walmsley, I. A.

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