NSF Young Investigator

技术文摘：将对介观半导体结构中的低温输运进行实验研究。将特别注意探索量子输运中的随机性与经典混沌的量子特征之间的联系。应用包括使用相参输运的反馈控制，目的是开发半导体量子点作为低噪声磁强计。非技术摘要：研究的重点是了解控制超小型器件中电子运动的物理原理。最近的结果表明，当电子可以移动的距离大于器件尺寸而没有明显的杂质和其他缺陷散射时，器件的几何形状就成为决定电子运动的一个重要因素。这种对几何的敏感性可以成为研究混沌运动的潜在机制并最终设计新设备的有用工具。这项研究将在低温和高质量的半导体结构中进行，以增加电子的迁移率。：

Technical abstract: An experimental investigation will be carried out of low temperature transport in mesoscopic semiconductor structures. Particular attention will be placed on exploring the connection between randomness in quantum transport and quantum signatures of classical chaos. Applications include the use of feedback control of phase-coherent transport for the purpose of developing semiconductor quantum dots to operate as low-noise magnetometers. Nontechnical abstract: The focus of the research is to understand the physics which governs the motion of electrons in ultrasmall devices. Recent results indicate that when the electrons can travel distances larger than the device dimension without appreciable scattering by impurities and other defects then the geometry of the device becomes a significant factor in determining the electron's motion. This sensitivity to geometry can be a useful tool to study the underlying mechanisms of chaotic motion and to ultimately design new devices. The proposed research will be carried out at low cryogenic temperatures and in very high quality semiconductor structures to increase the mobility of the electrons. :