Optically Driven Quantum Dot Spins for Quantum Computing: Coherence Between Spins in Entangled States

用于量子计算的光驱动量子点自旋：纠缠态自旋之间的相干性

• 批准号: 1104446
• 负责人: Duncan Steel
• 金额: $ 67.5万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1104446&HistoricalAwards=false
• 关键词: Optically; Driven; Quantum; Dot; Spins

Moore's limit in electronic devices and information processing represents the point in time where the number of devices per unit area is so high that the size of each device is on the order of few atoms and will no longer function according to design and the chip will fail. Our experiments are designed to go beyond this limit, working at the size level where quantum mechanics rather the classical behavior determines performance. We will develop coherent coupling between devices, without the need for wires, as well as implement quantum phase, say between particles carrying information, that will be used to carry additional information and serve to expand the horizon for invention and discovery. Our studies include understanding decoherence in entangled systems, a unique quantum phenomena, and provide insight that is quite general and outside our paradigm of semiconductor quantum dots. The increasingly sophisticated understanding of the interaction between a microscopic system (the electron spins) and a macroscopic system (the dot environment and control or measurement) within quantum theory will provide a basis for understanding and development of future technology as current approaches reach their operational limits. The interdisciplinary nature of the research at the frontier of applications of quantum physics is evident by the team of collaborators in the physics of semiconductor nano-structures, in high-precision coherent optical control and spectroscopy of quantum dots, and in many-body theory and light-matter interaction. The education in this new frontier for both graduate and undergraduate students contributes to the development of highly trained people critical to the infrastructure.

电子器件和信息处理中的摩尔极限代表了这样一个时间点，即每单位面积的器件数量如此之高，以至于每个器件的尺寸都在几个原子的数量级上，并且将不再根据设计起作用，芯片将失效。 我们的实验旨在超越这一限制，在量子力学而不是经典行为决定性能的尺寸水平上工作。我们将开发设备之间的相干耦合，而不需要电线，以及实现量子相位，比如在携带信息的粒子之间，这将用于携带额外的信息，并用于扩大发明和发现的范围。我们的研究包括理解纠缠系统中的退相干，这是一种独特的量子现象，并提供了相当普遍的见解，超出了我们的半导体量子点范式。 在量子理论中，对微观系统（电子自旋）和宏观系统（点环境和控制或测量）之间相互作用的日益复杂的理解将为理解和发展未来技术提供基础，因为当前的方法达到了它们的操作极限。 在量子物理学应用的前沿研究的跨学科性质是显而易见的合作者在半导体纳米结构的物理学，在高精度相干光控制和量子点的光谱学，并在多体理论和光物质相互作用的团队。在这一新的前沿领域，研究生和本科生的教育有助于培养对基础设施至关重要的训练有素的人才。