Multimode integrated time-frequency quantum photonics

多模集成时频量子光子学

• 批准号: EP/K026534/1
• 负责人: Brian Smith
• 金额: $ 12.43万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FK026534%2F1
• 关键词: Multimode; integrated; time; frequency; quantum

Quantum physics is at the centre of a technological revolution that promises to transform information and communications technologies (ICT) from secure communications, enhanced precision in measurement, high-capacity simulation and computation beyond that capable using only classical resources. These quantum-enhanced technologies will significantly increase the capacity to securely transmit and process the ever-rising volumes of data on which the global economy is based. The ability to simulate complex systems, both quantum and classical, could allow creation of new functional materials ranging from designer drugs to solar cells with improved efficiency. Furthermore, improved sensitivity in measurements opens paths to probe fundamental physics previously not accessible, as well as more practical applications such as low-light-level spectroscopy. Light will play a central role in many of these quantum technologies such as spectroscopy, imaging, communications, and computation. When addressing individual photons, information is most often encoded as one quantum bit (or qubit) of information per transmitted photon. However, this severely limits the information processing capacity of current approaches to small sizes. One recent approach to increase the complexity of quantum optical systems that can be achieved utilizes integrated quantum photonics, in which photons are generated, guided and manipulated on silicon chips. However, these techniques still rely on encoding information as qubits and do not take advantage of the rich structure of individual photons. This project will take a new approach to encoding an increased amount of information per photon, and thus allow significantly increased system complexity to be achieved.To increase the information capacity of single photons for integrated photonics this project will focus on encoding information in the time-frequency state of individual photons, in which the temporal shape and colour of the photon carry the information. This approach parallels methods used in classical ICT such as wavelength- and time-division multiplexing where information is encoded in the wavelength (colour) or arrival time of light pulses. This new approach is made possible by recent developments at Oxford in fibre-based photon sources and integrated quantum photonics, which allow deterministic frequency control of single photons. By moving to this regime of increased information capacity per photon on an integrated platform, the project aims to enable significant advances in quantum-enhanced technologies. Further afield the techniques for low-light-level time-frequency sensing developed during the project could be utilized in a diverse range of applications from spectroscopy to optical network diagnostics

量子物理学处于技术革命的中心，它有望将信息和通信技术（ICT）从安全通信、测量精度提高、高容量模拟和计算转变为超越仅使用经典资源的能力。这些量子增强技术将显着提高安全传输和处理全球经济所依赖的不断增加的数据量的能力。模拟复杂系统（包括量子系统和经典系统）的能力可以创造新的功能材料，从设计药物到效率更高的太阳能电池。此外，测量灵敏度的提高为探索以前无法实现的基础物理以及更实际的应用（例如低光光谱学）开辟了道路。光将在光谱学、成像、通信和计算等许多量子技术中发挥核心作用。当处理单个光子时，信息通常被编码为每个传输光子的一个量子位（或量子位）信息。然而，这严重限制了当前小尺寸方法的信息处理能力。最近一种提高量子光学系统复杂性的方法是利用集成量子光子学，其中光子在硅芯片上生成、引导和操纵。然而，这些技术仍然依赖于将信息编码为量子位，并且没有利用单个光子的丰富结构。该项目将采用一种新方法来编码每个光子更多的信息量，从而显着增加系统的复杂性。为了增加集成光子学的单光子的信息容量，该项目将重点关注在单个光子的时频状态下编码信息，其中光子的时间形状和颜色携带信息。这种方法与传统 ICT 中使用的方法类似，例如波长和时分复用，其中信息以光脉冲的波长（颜色）或到达时间进行编码。牛津大学最近在基于光纤的光子源和集成量子光子学方面的发展使这种新方法成为可能，它们允许对单光子进行确定性频率控制。通过在集成平台上提高每个光子的信息容量，该项目旨在实现量子增强技术的重大进步。在更远的地方，该项目期间开发的微光时频传感技术可用于从光谱学到光网络诊断的各种应用

项目成果

Quantum process estimation with an unknown detector

使用未知探测器进行量子过程估计

• 发表时间: 2014
• 期刊: Laser Science, LS 2014
• 作者: Karpin´ski M.

Local mapping of detector response for reliable quantum state estimation.

• DOI: 10.1038/ncomms5332
• 发表时间: 2014-07-14
• 期刊: NATURE COMMUNICATIONS
• 影响因子: 16.6
• 作者: Cooper, Merlin;Karpinski, Michal;Smith, Brian J.
• 通讯作者: Smith, Brian J.

Quantum state manipulation of single-photon wave packets

单光子波包的量子态操纵

• 发表时间: 2014
• 期刊: Frontiers in Optics, FiO 2014
• 作者: Wright L.J.

Qubit-Programmable Operations on Quantum Light Fields.

• DOI: 10.1038/srep15125
• 发表时间: 2015-10-15
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Barbieri M;Spagnolo N;Ferreyrol F;Blandino R;Smith BJ;Tualle-Brouri R
• 通讯作者: Tualle-Brouri R

Quantum Process Estimation with Unknown Measurements

未知测量的量子过程估计

• DOI: 10.1364/cleo_qels.2015.ftu4a.3
• 发表时间: 2015
• 作者: Smith B