Theoretical investigations of materials suitable for qubits and related applications

摘要建议：OISE-1132804 PI/机构：科珀史密斯，苏珊·N，威斯康星大学麦迪逊分校。威斯康星大学麦迪逊分校的Susan Coppersmith和Mark Friesen与布法罗大学的胡学东博士提议与巴西里约热内卢大学的Belita Koiller教授建立一个合作的国际网络，以执行适合于量子比特和相关应用的材料的研究。这项拟议工作的一个关键重点是研究硅的导带谷对自旋电子器件和量子器件的影响。最近的实验表明，硅/二氧化硅界面处的山谷分裂大大增强。这项提议中的几位研究人员已经证明，表面态可以导致这种增强。因此，拟议的协作网络的一个目标是看看这种机制是否适用于更普遍的情况，从而增强对山谷分裂的控制，并反过来使量子设备能够在更高的温度下运行。威斯康星州的实验工作将因布法罗的理论工作而得到加强。美国团队还将极大地受益于巴西研究人员的理论成就，他们在科勒博士的领导下，在研究固态材料中的量子物理方面拥有丰富的专业知识。拟议的国际调查人员网络的另一个好处是，美国学生和博士后参与合作，并得到在固态自旋电子学和量子信息处理科学方面拥有相关但独特专业知识的巴西同事的指导。

Abstract Proposal: OISE-1132804 PI/Institution: Coppersmith, Susan N., University of Wisconsin-MadisonDrs. Susan Coppersmith and Mark Friesen from the University of Wisconsin-Madison in conjunction with Dr. Xuedong Hu from the University of Buffalo propose to establish a collaborative international network with Prof. Belita Koiller from the University of Rio de Janeiro in Brazil to perform investigations of materials suitable for qubits and related applications. A key focus of the proposed work is the research on the effects of silicon's conduction band valleys on spintronic and quantum devices. Recent experiments have shown a greatly enhanced valley splitting at a silicon/silicon-dioxide interface. Several of the investigators in this proposal have shown that surface states can lead to such an enhancement. Thus one goal of the proposed collaborative network is to see if such a mechanism applies more generally which will enable enhanced control of the valley splitting, and in turn could enable quantum devices that can operate at higher temperatures. The experimental effort at Wisconsin will be enhanced by the theoretical work being advanced at Buffalo. The US team will also greatly benefit from the theoretical accomplishments of the Brazilian researchers who under Dr. Koiller have significant expertise in studying quantum physics in solid state materials.Another benefit from the proposed the international network of investigators is the involvement of US students and post-docs to collaborate and be mentored by Brazilian colleagues with related but distinct expertise on the science of solid-state spintronics and quantum information processing.