Information Transfer in Heisenberg Spin Chains

非技术摘要：量子信息处理有可能给现代技术带来革命性的变化，因为它提供了以指数级速度执行某些计算的能力，比任何经典计算机都快。这个项目研究了基于单个电子的量子比特之间传输信息的新方法，使用海森堡交换耦合，这是铁磁性背后的机制。通过解决量子比特之间传输信息的挑战，这是实验性量子信息处理中的主要障碍之一，这项研究朝着使量子计算成为现实迈出了重要的一步。该项目还涉及教育和外联工作。首席研究人员正在为当地初中生和高中生开发为期一周的互动实验物理课程，并在学年期间举办几个研讨会，旨在点燃下一代科学家对实验研究的热情。首席研究员还指导最先进的量子纳米技术的本科生和研究生。技术摘要：该项目的研究目标是研究基于半导体量子点中电子的海森堡自旋链中的信息传递。固态Heisenberg自旋链被认为是量子互连，通过它量子信息可以从一个地方无损失地传输到另一个地方。然而，到目前为止，实验技术还没有赶上这些提议。这个项目向研究这一未被探索的物理学领域迈出了第一步。具体的目标是在半导体量子点中实现海森堡自旋链，探索三个相互作用的自旋系统中的共振态转移，以及探索四自旋链中通过海森堡自旋母线的信息转移。这项研究探索了一种在固态自旋链中传输信息的新方法。因此，这项研究有可能发现固态系统中经典和量子信息传输的新的和有效的模式。材料研究部门(DMR)的这项拨款支持研究，以了解基于半导体量子点中电子的海森堡自旋链中的信息传输，资金来自数学和物理科学总监DMR中的凝聚态物质物理(CMP)计划。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Non-technical Abstract:Quantum information processing has the potential to revolutionize modern technology by offering the capability to perform some computations exponentially faster than any classical computer. This project studies new ways to transfer information between qubits based on individual electrons using Heisenberg exchange coupling, which is the mechanism behind ferromagnetism. By addressing the challenge of transferring information between qubits, which is one of the main obstacles in experimental quantum information processing, this research takes major steps toward making quantum computing a reality. This project also involves education and outreach efforts. The principal investigator is developing interactive, week-long courses in experimental physics for local middle- and high-school students during the summer and also several workshops during the school year designed to ignite a passion for experimental research in the next generation of scientists. The principal investigator is also mentoring undergraduate and graduate students in state-of-the-art quantum nanotechnology.Technical Astract:The research objective of this project is to investigate information transfer in Heisenberg spin chains based on electrons in semiconductor quantum dots. Solid-state Heisenberg spin chains have been proposed as quantum interconnects through which quantum information can be transmitted from one place to another without loss. However, experimental technology has not caught up to these proposals until now. This project takes the first steps toward investigating this unexplored region of physics. The specific objectives are to implement Heisenberg spin chains in semiconductor quantum dots, explore resonant state transfer in systems of three interacting spins, and to explore information transfer via a Heisenberg spin bus in a four-spin chain. This research explores what will become a new method of information transfer in solid-state spin chains. As a result, this research has the potential to uncover new and efficient modes of classical and quantum information transfer in solid-state systems.This Division of Materials Research (DMR) grant supports research to understand information transfer in Heisenberg spin chains based on electrons in semiconductor quantum dots with funding from the Condensed Matter Physics (CMP) program in DMR of the Mathematical and Physical Sciences Directorate.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.