Research in Quantum-Enhanced, Ultrafast Sensing and Imaging

量子增强、超快传感和成像研究

• 批准号: 0116045
• 负责人: Ian Walmsley
• 金额: $ 24万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-15 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0116045&HistoricalAwards=false
• 关键词: Research; Quantum; Enhanced; Ultrafast; Sensing; Research; Quantum; Enhanced; Ultrafast; Sensing

This document outlines a program of research to develop practical methods for ultrabroadband imaging with quantum enhancement of the detection sensitivity. In particular it presents several novel techniques for the characterization of ultrafast optical and X-ray waveforms, and then discusses ways to apply them to broadband dynamical imaging, including possibilities for going well beyond the shot-noise limit for phase andamplitude measurement accuracy. The program covers both development of appropriate dynamical image detection, protocols for image transmission, and the sources of particular quantum states needed for enhanced sensitivity.The program has four major experimental objectives. (I) The first goal consists of developing a novel method for measuring the conplete spatio-temporal properties of an ultrafast optical pulse. The basic idea involves extending interferometric methods of ultrafast pulse measurement into a new domain of accuracy and precision. In particular we shall develop an ultrafast multi-wavelength interferometry: for dynamical space-time imaging. (II) The second portion of our program entails the development of a novel method for obtaining attosecond temporal resolution for dynamical X ray imaging. The project will first study a recently demonstrated nonlinear optical mechanism for atomic ionization to implement an interferometric pulse measurement technique for completely characterizing the electric field of the attosecond pulse. This technique is based on the quantum interference on two pathways for ionizing an electron, which leads to an interference pattern in the electron energy spectrum. From this pattern the spectral phase of the ionizing attosecond pulse can be reconstructed using a simple, noniterative, algorithm. (III) Another project involves the use of entangled states of ultrashort photon wavepackets to implement time-resolved and quantum-enhanced sensitivity for near-field microscopy. This provides phase sensitivity in principle well beyond the shot noise limit, and will allow the development of ultrasensitive nanoscale measurement when combined with standard laboratory methods of near-field microscopy. A novel feature of the approach is that the nonclassical light does not need to enter the interferometer and probe the phase shifting object the quantum enhancement is achieved using local entanglement. (IV) The final effort will be to develop a means for the secure transmissionof images encoded in ultrashort single photons: a type of ultrabroadband quantum teleportation. This work explores new avenues in quantum communications by exploring possibilities for multimode teleportation and builds upon recent work in the applications in quantum optics of high-quantum efficiency CCD array detectors. These provide a novel tool for both quantum state measurement, which itself has useful imagingapplications, and for providing the broadband classical information needed for the teleportation protocol.

本文档概述了一项研究计划，以开发实用方法，以增强检测灵敏度的量子成像。特别是它提出了几种新型技术，用于表征超快光学和X射线波形，然后讨论将它们应用于宽带动力学成像的方法，包括超出相位和降量测量精度的射击噪声极限的可能性。该程序既涵盖了适当的动态图像检测的开发，图像传输方案以及增强灵敏度所需的特定量子状态的来源。该程序具有四个主要的实验目标。 （i）第一个目标是开发一种新的方法，用于测量超快光脉冲的固定时空特性。基本思想涉及将超快脉冲测量的干涉方法扩展到一个新的准确性和精确域。特别是我们将开发超快多波长干涉法：用于动态时空成像。 （ii）我们程序的第二部分需要开发一种新的方法，用于获得动态X射线成像的attosent时间分辨率。该项目将首先研究一种最近证明的非线性光学机制，用于实现干涉脉冲测量技术，以完全表征Attosend脉冲的电场。该技术基于对电子电离的两种途径的量子干扰，这导致电子能谱中的干扰模式。从这种模式来看，可以使用简单的，非词汇，算法来重建电离attosent脉冲的光谱阶段。 （iii）另一个项目涉及使用超短光子波袋的纠缠状态来实现对近场显微镜的时间分辨和量子增强的灵敏度。这原理提供了相位敏感性，远远超出了射击噪声极限，并且将与近场显微镜的标准实验室方法结合使用时，可以开发超敏感的纳米级测量。该方法的一个新功能是，非经典的光无需进入干涉仪并探测相位转移对象使用局部纠缠实现量子增强。 （iv）最终的工作将是为用超短单光子编码的安全传输图像开发一种手段：一种超生产的量子量子传送。这项工作通过探索多模传送的可能性来探索量子通信中的新途径，并基于高量化效率CCD阵列检测器量子光学的最新工作。这些为两种量子状态测量提供了一种新颖的工具，该工具本身具有有用的成像应用程序，并提供了传送协议所需的宽带经典信息。