CAREER: Quantum Transport in Ultrafast Nanoscale Devices

这项研究的目标是发展和计算实现电子输运理论中的一种新的形式，它将能够充分地描述纳米尺寸半导体器件中的瞬变区域。对于以太赫兹速度工作的器件，瞬时响应取决于触点中载流子和有源区中载流子之间多粒子关联的建立和破坏。这使得该装置在理论上成为一个具有挑战性的动态开放多粒子系统。智力优势：这个研究项目采取的方法是将量子信息论中传统上用于非常小的开放系统的形式主义进行扩展，建立一座桥梁，连接到非平衡格林函数的强大形式主义，然后使用修改后的格林函数作为新的、完全量子力学的核，用于纳米尺度上的时间分辨模拟。此外，这项研究计划将打开一扇窗，让我们探索快速多电子现象在设备应用中的应用。这项技术还可能对开放系统(例如量子信息)和初始关联(例如等离子体物理)感兴趣的其他科学和技术领域产生影响。这一职业发展计划的更广泛影响将是教育、科学和技术。虚拟纳米电子实验室(VNL)是一种基于网络的教育工具，包含小应用程序、课程材料、教学视频和定制软件，将作为威斯康星大学麦迪逊分校固态电子和运输研究生水平课程的一部分开发和使用。将为高中教师和来自代表性不足群体的本科生提供研究机会。

The objective of this research program is the development and computational implementation of a novel formalism in the electronic transport theory, which will enable an adequate description of the transient regime in nanometer-size semiconductor devices. For devices operating at THz speed, the transient response is governed by the build-up and destruction of many-particle correlations between the carriers in the contacts and those in the active region. This makes the device a theoretically challenging dynamically open many-particle system. Intellectual merit:The approach taken in this research program is to extend a formalism traditionally used in quantum information theory for very small open systems, make a bridge to the powerful formalism of nonequilibrium Greens functions, and then use the modified Greens functions as a new, fully quantum-mechanical kernel for the time-resolved simulation on the nanoscale. In addition, this research program will open a window into exploiting the fast multi-electron phenomena for device applications. The technique will also likely have an impact on other areas of science and technology in which there is interest in open systems (e.g., quantum information) and initial correlations (e.g., plasma physics).Broader impact of this career development plan will be educational, scientific, and technological. Virtual Nanoelectronics Lab (VNL), a web-based educational tool containing applets, course materials, instructional videos, and custom-made software will be developed and used as part of the graduate level courses in solid state electronics and transport at the University of Wisconsin - Madison. Research opportunities for high-school teachers and undergraduates from underrepresented groups will be provided.