Quantum Shot Noise and Electron Correlations in Nanostructures

这个实验研究项目主要关注相干态纳米结构中的电子噪声和相互关系。这些研究将探索电子如何与其环境相互作用，并将提供关于电子相位和相关性的影响的新信息。噪声研究将在0.1到20 GHz的频率范围内，在扩散微桥和量子点接触中进行。还可以研究超导体-正常金属接触的位相相干输运、亚泊松散粒噪声和噪声。还将研究噪声随频率的频谱分布的量子极限。这个研究项目涉及对用于辐射探测的纳米级电子器件中噪声的来源和限制进行实验研究，重点是0.1到20 GHz的频率范围。这种探测器的应用包括射电天文学和雷达接收器。这项研究的新颖性在于它专注于纳米级设备，其中电子的量子行为变得重要。在这种情况下，对噪声效应的理解是不完整的，无论是在实验上还是理论上都是如此。这项研究的结果可能包括不同寻常的新效应或探测器设备，它们可能会在技术上找到新的应用。这项研究项目本质上是跨学科的，涉及研究生和本科生，他们将接受良好的培训，进入工业、政府或教育领域的职位。***

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. ***