CAREER: Coherent Single-Photons for Quantum Information

职业：用于量子信息的相干单光子

• 批准号: 1452840
• 负责人: Edward Flagg
• 金额: $ 70万
• 依托单位: West Virginia University Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-03-01 至 2022-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1452840&HistoricalAwards=false
• 关键词: CAREER; Coherent; Single; Photons; Quantum

Non-Technical Abstract:This award is funded by the Condensed Matter Physics program in the Division of Materials Research, the Physics at the Information Frontier program in Physics and the EPSCoR program. Quantum computation and communication offer great potential benefits to processing power and communication security by exploiting the non-intuitive properties of quantum mechanics. Photons will play an active part in future quantum information processing schemes, and semiconductor nanostructures called quantum dots are likely candidates to act as photon sources. Currently, however, photons produced by quantum dots are not suitable because of spectral diffusion experienced by the dots. The goal of this research project is to identify, model, and establish effective strategies to mitigate the factors responsible for spectral diffusion. The project involves graduate and undergraduate students who are being trained in optical and spectrographic measurement techniques, quantum optics, and condensed matter physics. Also integral to the project is the development, evaluation, and dissemination of an optics-related learning module for 4-H youth groups in West Virginia. The optics learning module fills a gap in the physical science curriculum available to 4-H group leaders, and will improve the students' science literacy and increase the number pursuing science-related careers. Volunteers from graduate and undergraduate physics societies are involved in the development and testing of the learning module, whereby they gain valuable outreach and educational experience that will help prepare them for future public education efforts.Technical Abstract:Photons emitted by quantum dots are potentially important in a number of quantum information processing applications, but because their coherence is currently non-ideal, that potential remains severely limited. The level of coherence of quantum dot photons is reduced by spectral diffusion due to interactions between a dot and its local environment, specifically fluctuations in the nearby charge distribution. In order to significantly improve the degree of coherence of quantum dot photons there is a critical need to identify and be able to control the environmental and external sources of spectral diffusion in the dots. The goal of the research project is to characterize the magnitude and timescale of spectral diffusion under different experimental conditions, model the interaction of the dots and the environment, and design photon sources with reduced or no spectral diffusion. The rationale for this approach is that reducing or eliminating spectral diffusion in a variety of situations is expected to enable the design of quantum dot-based photon sources with significantly higher fidelity performance than is currently possible in interference-based quantum information processing protocols. A complementary outreach effort involves graduate and undergraduate students in the design, evaluation, and state-wide dissemination of an optics-related 4-H learning module.

非技术摘要：该奖项由材料研究部凝聚态物理项目、物理学信息前沿项目和 EPSCoR 项目资助。 量子计算和通信通过利用量子力学的非直观特性，为处理能力和通信安全提供了巨大的潜在好处。 光子将在未来的量子信息处理方案中发挥积极作用，而被称为量子点的半导体纳米结构很可能成为光子源的候选者。 然而，目前由量子点产生的光子并不合适，因为量子点会经历光谱扩散。 该研究项目的目标是识别、建模和建立有效的策略来减轻光谱扩散的影响因素。 该项目涉及研究生和本科生，他们正在接受光学和光谱测量技术、量子光学和凝聚态物理方面的培训。 该项目的另一个组成部分是为西弗吉尼亚州 4-H 青年团体开发、评估和传播与光学相关的学习模块。 光学学习模块填补了4-H小组领导者物理科学课程的空白，并将提高学生的科学素养并增加追求科学相关职业的人数。 来自研究生和本科生物理学会的志愿者参与了学习模块的开发和测试，从而获得了宝贵的外展和教育经验，这将有助于他们为未来的公共教育工作做好准备。 技术摘要：量子点发射的光子在以下领域具有潜在的重要意义：许多量子信息处理应用，但由于它们的相干性目前并不理想，因此潜力仍然受到严重限制。由于点与其局部环境之间的相互作用，特别是附近电荷分布的波动，光谱扩散降低了量子点光子的相干性水平。 为了显着提高量子点光子的相干程度，迫切需要识别并能够控制点中光谱扩散的环境和外部源。 该研究项目的目标是表征不同实验条件下光谱扩散的幅度和时间尺度，模拟点与环境的相互作用，并设计光谱扩散减少或无光谱扩散的光子源。这种方法的基本原理是，减少或消除各种情况下的光谱扩散有望使基于量子点的光子源的设计与目前基于干扰的量子信息处理协议相比具有显着更高的保真度性能。 另一项补充性的推广工作涉及研究生和本科生参与光学相关 4-H 学习模块的设计、评估和全州范围内的传播。