Quantum Shot Noise and Electron Correlations in Nanostructures

本实验研究项目主要研究相参纳米结构中的电子噪声和相关关系。这些研究将探索电子如何与环境相互作用，并将提供有关电子相位和相关性影响的新信息。噪声研究将在扩散微桥和量子点接触中进行，频率范围为0.1至20GHz。相参输运、亚泊松散粒噪声和超导体-正常金属接触的噪声也可以研究。对噪声随频率谱分布的量子限制也将进行研究。本研究项目涉及实验研究用于探测辐射的纳米级电子设备的噪声来源和限制，重点研究0.1至20GHz频率范围。这种探测器的应用包括射电天文学和雷达接收器。这项研究的新颖之处在于它集中在纳米尺度的器件上，电子的量子行为变得非常重要。在这种情况下，无论从实验上还是理论上，对噪声效应的理解都是不完整的。这项研究的结果可能包括不寻常的新效应或可能在技术上找到新的应用的探测器装置。这个研究项目是跨学科的，涉及研究生和本科生，他们将接受良好的培训，进入工业、政府或教育部门的职位。＊＊＊

w:\awards\awards96\num.doc 9701427 Prober This experimental research project focuses on electron noise and correlations in phase-coherent nanostructures. These studies will explore how electrons interact with their environment and will provide new information on the effects of electron phase and correlations. The noise studies will be carried in diffusive microbridges and quantum point contacts, in the frequency range of 0.1 to 20GHz. Phase coherent transport, sub-Poisson shot noise, and noise of superconductor-normal metal contacts may also be studied. Quantum limits on the spectral distribution of the noise with frequency will also be investigated. %%% This research project involves experimentally studies the origins and limits on noise in nanometer-scale electron devices used to detect radiation, emphasizing the 0.1 to 20GHz frequency range. Applications of such detectors include radio astronomy and radar receivers. The novelty of the research is in its focus on nanometer scale devices where quantum behavior of electrons becomes important. In these circumstances the understanding of noise effects is incomplete, both experimentally and theoretically. Results from this research may include unusual new effects or detector devices which may find new application in technology. This research project is interdisciplinary in nature and involves both graduate and undergraduate students who will be excellently trained to enter positions in industry, government or education. ***