Entanglement in Correlated Nanostructures

** 非技术摘要 * 该项目的目标是利用电子的量子力学特性来创建先进的固态设备，特别是其中信息被编码在空间分离的电子中的设备。这些设备的潜在应用-其中电子信息是“纠缠”-包括先进的密码学和超强大的“量子”计算机。设备将使用纳米技术制造技术和材料，如超导体，碳纳米管和铁磁体。 测量电子的电导和相互作用等量的实验将得到理论的支持，以系统地解决与纠缠器的实现有关的问题。这项工作将导致成功的纠缠器设备，也将使我们对一些关键纳米材料的理解取得重大进展。该研究的合作结构将提供一个丰富的环境，培养本科生，研究生和博士后研究人员在广泛的纳米技术相关的工作。将通过制定与拟议研究直接相关的课程，并通过针对高中教师、妇女和代表性不足的少数群体的与研究有关的研讨会和会议，进一步纳入教育方面。技术摘要 * 本项目的目标是在纳米结构中产生和表征自旋相关电子对，作为实现固态量子纠缠器件的重要一步。来自超导体的自旋分离单态将被注入空间分离的碳纳米管和铁磁纳米线中，以创建自旋纠缠器件。传输，相位相干性和噪声相关性的实验测量将得到理论研究的支持，以解决诸如竞争有序态的影响，超导体相关态界面的邻近效应以及自旋注入，自旋传输和纠缠测试的最佳测量配置等问题。这项工作将使我们对强相关纳米系统的理解取得重大进展，并可能成为未来固态量子密码学，隐形传态和量子计算设备的基础。该研究的合作结构将提供一个丰富的环境，培养本科生，研究生和博士后研究人员在广泛的纳米技术相关的工作。将通过制定与拟议研究直接相关的课程，并通过针对高中教师、妇女和代表性不足的少数群体的与研究有关的研讨会和会议，进一步整合教育方面的内容。

******NON-TECHNICAL ABSTRACT*****The goal of this project is to use the quantum mechanical properties of electrons to create advanced solid-state devices, particularly devices in which information is encoded in spatially-separated electrons. Potential applications of these devices - in which electronic information is "entangled" - include advanced cryptography and ultra-powerful "quantum" computers. Devices will be created using nanotechnology fabrication techniques and materials such as superconductors, carbon nanotubes, and ferromagnets. Experiments measuring quantities such as the electrical conductance and interactions of electrons will be supported by theories to work systematically through issues related to the implementation of an entangler. The work will result in successful entangler devices, and will also allow for significant progress in our understanding of some key nanoscale materials. The collaborative structure of the research will provide a rich environment for training undergraduates, graduate students, and postdoctoral researchers in a broad spectrum of nanotechnology-related work. Educational aspects will be further integrated through the development of courses directly related to the proposed research and through research-related seminars and meetings that target high-school teachers, women, and underrepresented minorities.****** TECHNICAL ABSTRACT*****The goal of this project is to create and characterize spin-correlated electron pairs in nanostructures as a major step towards the realization of solid-state quantum entangler devices. Spin-separated singlets from superconductors will be injected into spatially separated carbon nanotubes and ferromagnetic nanowires to create spin-entangled devices. Experimental measurements of transport, phase coherence, and noise correlations will be supported by theoretical investigations to address issues such as the influence of competing ordered states, the proximity effect at superconductor-correlated state interfaces, and optimal measurement configurations for spin injection, spin transport, and entanglement tests. This work will allow for significant progress in our understanding of strongly-correlated nanoscale systems, and may form the basis of future solid-state quantum cryptography, teleportation, and quantum computation devices. The collaborative structure of the research will provide a rich environment for training undergraduates, graduate students, and postdoctoral researchers in a broad spectrum of nanotechnology-related work. Educational aspects will be further integrated through the development of courses directly related to the proposed research and through research-related seminars and meetings that target high-school teachers, women, and underrepresented minorities.