Quantum Dynamics at High Frequencies of Electrons in Mesoscopic Nanostructures

这个实验凝聚态物理项目将探索电子在介观导体和超导体中的高频(10-100 GHz)的动力学。这些研究将集中在超导/正常/超导结构中的噪声、微波光子的退相、光子激发的能量分布和增强的超导电流。该项目还将通过互相关测量来探索超导相位差对噪声量子统计的影响。我们的目标是了解这些超导体-正常混合系统的动力学行为。该项目将为学生提供最先进的测量技术培训，并将为他们在学术界、工业和政府部门的职业生涯做好准备。%与超导体等量子力学系统相关的一个重要的基础和技术问题是它们对外部电场和磁场的响应速度。当量子系统非常小时，这些问题变得更加困难。因此，微电子器件结构不断缩小到越来越小的尺寸带来了巨大的测量挑战，特别是在微波领域的高频测量。这个实验凝聚态物理项目将探索电子在介观导体和超导体中的高频(10-100 GHz)的动力学。该项目将探索超导回路中的电流流动，以及电子通过量子力学运动穿过的势垒。我们的目标是了解这些超导体-正常混合系统的动力学行为。为了实现这些目标，正在开发新的测量技术。该项目将为学生和博士后提供状态或区域测量方法的出色培训。它将为他们在学术界、工业界和政府的职业生涯做好准备。

This experimental condensed matter physics project will explore the dynamics at high frequencies, 10-100 GHz, of electrons in mesoscopic conductors and superconductors. The studies will focus on noise, dephasing due to microwave photons, photon-stimulated energy distributions and enhanced super currents in superconducting/normal/superconducting structures. The project will also explore the effect of a superconducting phase difference on the quantum statistics of the noise, via cross-correlation measurements. The goal is to understand the dynamical behavior of these mixed superconductor-normal systems. The project will provide students with training in state-of-the art measurement techniques, and will prepare them for careers in academe, industry and government.%%%An important fundamental and technical issue connected with quantum mechanical systems, such as superconductors, is how fast they respond to external electric and magnetic fields. These problems become more difficult when the quantum systems are very small in size. Thus the continual downsizing of microelectronic device structures to smaller and smaller sizes presents substantial measurement challenges, particularly at high frequencies, in the microwave region. This experimental condensed matter physics project will explore the dynamics at high frequencies, 10-100 GHz, of electrons in mesoscopic conductors and superconductors. The project will explore current flows in superconducting loops and across barriers through which electrons tunnel via quantum mechanical motion. The goal is to understand the dynamical behavior of these mixed superconductor-normal systems. New measurement techniques are being developed to reach these goals. The project will provide excellent training for students and post-docs in state-or-the are measurement methods. It will prepare them for careers in academe, industry and government.