CAREER: Interfacing Remote Quantum Dot Nanostructures by Resonant Light Scattering

职业：通过共振光散射连接远程量子点纳米结构

• 批准号: 1254324
• 负责人: Andreas Muller
• 金额: $ 59.5万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-02-15 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1254324&HistoricalAwards=false
• 关键词: CAREER; Interfacing; Remote; Quantum; Dot

****TECHNICAL ABSTRACT****The goal of this project is the demonstration of an elementary quantum interface between two spatially separated solid-state quantum systems by using resonant light scattering, with the purpose of producing entanglement. It will be shown that InAs quantum dot nanostructures, with outstanding quantum-coherent optical properties, can generate single photons suitably-tailored for this purpose. In a phased approach indistinguishable photons from remotely located quantum dots will be produced using monochromatic continuous-wave, multichromatic and finally pulsed laser excitation. A tomographic analysis will be implemented to verify the generation of entanglement once a sufficiently large degree of two-photon interference has been obtained. Unique advantages of this approach lie in the relaxed requirements for frequency matching of photons as well as in reduced dephasing when compared to non-resonant excitation. A quantitative understanding of phenomena expected to hinder the manifestation of entanglement, in particular spectral diffusion, will be sought out. This research which lies at the boundary of condensed matter physics, nanoscience, and quantum optics will be an invaluable multidisciplinary experience for graduate and undergraduate students. A comprehensive outreach effort is designed to disseminate excitement and knowledge to a larger public by organizing professional development for teachers, high school senior student projects, campus tours, and classroom demonstrations. ****NON-TECHNICAL ABSTRACT****Quantum mechanical methods to encode, process and transmit information are expected to replace one day the current classical architecture of information technology. Quantum mechanical states produced by or encoded in condensed matter systems are particularly attractive to achieve this goal because of their intrinsic scalability and compatibility with existing micro and nanofabrication technology. The goal of this project is to use resonant light scattering from laser-driven InAs quantum dot nanostructures for the purpose of creating quantum mechanical superposition states between remotely located entities. The resulting quantum entanglement, in which the measurement of the state of one entity determines with certainty the outcome of the measurement of the state of the other entity, is a central resource in quantum information science. This project provides a previously unexplored route to entanglement in solids, relying on a resonant light generation mechanism that produces indistinguishable photons. Combining unique expertise from materials science, quantum optics and photonics engineering, this work will offer hands-on research experience to undergraduate and graduate students in a multidisciplinary environment. The project includes a comprehensive plan to make this knowledge accessible to a larger pubic, via professional development for teachers, high school senior project student participation, campus tours, and classroom demonstrations.

*技术摘要*这个项目的目标是通过共振光散射演示两个空间分离的固态量子系统之间的基本量子界面，目的是产生纠缠。结果表明，具有优异的量子相干光学性质的InAs量子点纳米结构可以产生适合于此目的的单光子。在一种分阶段的方法中，将使用单色连续波、多色和最终脉冲激光激励来产生来自遥远量子点的难以区分的光子。一旦获得了足够大的双光子干涉程度，将进行层析分析以验证纠缠的产生。这种方法的独特优势在于对光子频率匹配的宽松要求以及与非共振激发相比减少的去相移。将寻求对阻碍纠缠表现的现象的定量理解，特别是光谱扩散。这项研究位于凝聚态物理、纳米科学和量子光学的边缘，对于研究生和本科生来说，这将是一次宝贵的多学科经验。一项全面的外展活动旨在通过为教师、高中生项目、校园参观和课堂演示组织专业发展，向更广泛的公众传播兴奋和知识。*非技术摘要*用于编码、处理和传输信息的量子力学方法有望有朝一日取代目前经典的信息技术体系结构。在凝聚态系统中产生或编码的量子力学状态因其固有的可扩展性和与现有微纳制造技术的兼容性而特别吸引人来实现这一目标。该项目的目标是利用激光驱动的InAs量子点纳米结构的共振光散射来在遥远的实体之间创建量子力学叠加态。由此产生的量子纠缠是量子信息科学的核心资源，其中对一个实体的状态的测量确定了另一个实体的状态的测量结果。这个项目提供了一种以前从未探索过的在固体中进行纠缠的途径，依靠的是产生难以区分的光子的共振光产生机制。这项工作结合了材料科学、量子光学和光子学工程的独特专业知识，将在多学科环境中为本科生和研究生提供实践研究体验。该项目包括一个全面的计划，通过教师的专业发展、高中高级项目学生参与、校园参观和课堂演示，使更大范围的公众能够获得这些知识。