EMT/QIS: Quantum Control of Impurity States in a Semiconductor

EMT/QIS：半导体中杂质态的量子控制

• 批准号: 0829854
• 负责人: Brage Golding
• 金额: $ 45万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0829854&HistoricalAwards=false
• 关键词: EMT; QIS; Quantum; Control; Impurity

Quantum Control of Impurity States in a SemiconductorBrage Golding and Mark DykmanMichigan State UniversityE. Lansing, MI 48824ABSTRACTQuantum information is a new and rapidly developing interdisciplinary area of researchthat resides at the interface between quantum physics and information science. Itaddresses some of the most challenging fundamental problems in science and technologywhile seeking to advance our understanding of the unique properties of the quantumworld. Among the predictions in this field is that of an exponential speedup of computersthat operate on purely quantum principles. If quantum properties are to be exploited forqualitatively new capabilities, it is necessary to build systems that exhibit long-lived,controllable quantum states. In addition, the devices should be compatible withconventional electronics and photonics. The devices based on controlled impurity statesin semiconductors stand out as particularly attractive, since they should be scalable,operate at high speed, and take advantage of existing semiconductor technology.The quantum systems studied in this experimental and theoretical research are based onacceptors in a semiconductor such as silicon. These are substitutional dopants, whoseatomic-like properties are well-known and invariant. The two states of a qubit are thelowest orbital states of the acceptor, a result of splitting of the ground state by strain andelectric field. The distance between the energy levels is in the range of a few GHz andeach qubit is individually controlled by a gate electrode. Single-qubit operations can beperformed with short microwave pulses whereas two-qubit operations are enabled by thelong-range dipolar interaction between the acceptors, which allows the qubit-qubitdistance to be more than 100 nm. The readout of the final state of the system is based onquantum nondemolition optical measurement of light scattering by an exciton bound tothe acceptor.

半导体金黄色和马克·迪克曼米奇根州立大学中杂质状态的量子控制。 MI 48824ABSTRACTQUANTUM信息是一个新的且快速发展的研究领域。 ITSDRESS旨在提高我们对量子世界独特属性的理解，这是科学和技术中一些最具挑战性的基本问题。在该领域的预测中，计算机的指数加速为纯粹的量子原理。如果要利用量子性能以获得质量的新功能，则有必要构建具有长寿，可控制的量子状态的系统。另外，设备应与通用电子和光子学兼容。基于受控杂质状态的设备在半导体中脱颖而出，因为它们应具有可扩展性，高速运行并利用现有的半导体技术。这项实验和理论研究中研究的量子系统是基于硅等半导体的载体。这些是替代的掺杂剂，Whoseatomic样特性是众所周知的和不变的。量子的两个状态是受体的最高轨道状态，这是通过应变和电场对基态分裂的结果。能量水平之间的距离在几个GHz和EAST值的范围内由门电极单独控制。单量操作可以用短的微波脉冲来表现出来，而通过受体之间的Thelong-range偶极相互作用，可以实现两Q量的操作，从而使Qubit-qubitdistance可以超过100 nm。系统的最终状态的读数基于对激子绑定受体对光散射进行光散射的onquantum onquantum。