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Investigating Quantum Coherence using Structured Electron Interferometry

使用结构电子干涉测量法研究量子相干性

基本信息

批准号：
2012191
负责人：
Benjamin McMorran
金额：
$ 57.23万
依托单位：
University of Oregon Eugene
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-08-15 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012191&HistoricalAwards=false
关键词：
Investigating Quantum Coherence using Structured

项目摘要

General audience abstract:This project will enable and expand quantum-inspired measurements with electrons. The vast majority of modern developments in quantum measurement and quantum information technologies use photons, the smallest unit of light, as a central component. Yet the wavelike nature of photons still places fundamental limits on the smallest length scale at which this can be applied. Many of these quantum measurement protocols can be implemented with matter waves as well, but the technologies used to generate, manipulate, apply, and detect matter waves are not as well-developed as those for photons. This project develops new quantum techniques in the electron microscope, such as interaction-free measurements using electrons, and applies them to explore various phenomenon at the nanoscale. This will provide new quantum electron microscopy tools that can be used to reduce the size of quantum devices, similar to how conventional electron microscopes enabled the reduction in size of classical electronic computing components. In addition to providing training to graduate and undergraduate students in advanced microscopy and nanoscience, this project will engage first-year STEM majors as well, providing a “bridge” over the summer into their second year by introducing them to programming, data analysis, electron microscopy, nanofabrication, and optical physics.Technical audience abstract:The research team will develop and use tools to both prepare and measure the coherence and the phase of free electron wavefunctions inside electron microscopes. Nanoscale diffraction holograms provide a way to coherently manipulate the phase profile of individual electrons as well as measure them. For example, diffraction holograms produce free electron wavefunctions with helical phase profiles that provide a new way to probe the chirality and spatial coherence of nanoscale plasmonics. Electron-transparent phase gratings serve as optimized beamsplitters for electrons, which are used in this project to create electron interferometers with large path separation, useful for measuring electric and magnetic fields at the nanoscale. Interaction-free measurement protocols will also be explored, which could enable high resolution electron microscopy of easily damaged materials. The project connects with a broad spectrum of sciences and applications, enabling unique opportunities for project participants in a range of disciplines and industries.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

普通观众摘要：这个项目将实现和扩展量子激发的电子测量。量子测量和量子信息技术的绝大多数现代发展都使用最小的光单位光子作为中心组件。然而，光子的波状性质仍然将其应用在最小的长度尺度上。这些量子测量协议中的许多也可以用物质波来实现，但用于产生、操纵、应用和探测物质波的技术没有光子技术那么发达。该项目在电子显微镜中开发了新的量子技术，例如使用电子进行无相互作用测量，并将它们应用于在纳米尺度上探索各种现象。这将提供新的量子电子显微镜工具，可用于缩小量子设备的尺寸，类似于传统电子显微镜如何使经典电子计算组件的尺寸缩小。除了为研究生和本科生提供高级显微镜和纳米科学方面的培训外，这个项目还将吸引STEM专业一年级的学生，通过向他们介绍编程、数据分析、电子显微镜、纳米制造和光学物理，在夏季为他们提供进入二年级的“桥梁”。技术受众摘要：研究小组将开发和使用工具来准备和测量电子显微镜内自由电子波函数的相干性和相位。纳米级的衍射全息图提供了一种相干地操纵单个电子的位相分布以及测量它们的方法。例如，衍射全息图产生具有螺旋相位分布的自由电子波函数，这为探测纳米尺度等离子体的手性和空间相干性提供了一种新的方法。电子透明位相光栅用作电子的优化分束器，在该项目中用于创建具有大路径间隔的电子干涉仪，用于测量纳米尺度的电场和磁场。还将探索无相互作用的测量方案，这将使高分辨率电子显微镜能够对容易损坏的材料进行研究。该项目与广泛的科学和应用相联系，为一系列学科和行业的项目参与者提供了独特的机会。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（12）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

2-Grating Inelastic Free Electron Interferometry

2光栅非弹性自由电子干涉测量

DOI：
10.1017/s1431927621005444
发表时间：
2021
期刊：
Microscopy and Microanalysis
影响因子：
2.8
作者：
Johnson, Cameron;Turner, Amy;de Abajo, F. Javier;McMorran, Benjamin
通讯作者：
McMorran, Benjamin

Interaction-Free Measurement with Electrons

DOI：
10.1103/physrevlett.127.110401
发表时间：
2021-09-07
期刊：
PHYSICAL REVIEW LETTERS
影响因子：
8.6
作者：
Turner, Amy E.;Johnson, Cameron W.;McMorran, Benjamin J.
通讯作者：
McMorran, Benjamin J.

An Improved Average Atomic Number Calculation for Estimating Backscatter and Continuum Production in Compounds

一种改进的平均原子数计算，用于估计化合物中的反向散射和连续产生

DOI：
10.1093/micmic/ozad069
发表时间：
2023
期刊：
Microscopy and Microanalysis
影响因子：
2.8
作者：
Donovan, John;Ducharme, Andrew;Schwab, Joseph J;Moy, Aurélien;Gainsforth, Zack;Wade, Benjamin;McMorran, Benjamin
通讯作者：
McMorran, Benjamin

Optimized Amplitude-Dividing Beam Splitter Gratings for 4D STEM Holography

用于 4D STEM 全息术的优化分幅分束器光栅