Quantum optics and spin physics with solid-state defect centres

具有固态缺陷中心的量子光学和自旋物理

• 批准号: 435554-2013
• 负责人: Childress, Lilian
• 金额: $ 2.33万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=684393
• 关键词: Quantum; optics; spin; physics; solid

The tiny magnetic moments of electrons or nuclei - spins - offer a physical system that can behave quantum mechanically over extraordinarily long timescales; in some cases they can exhibit coherent evolution for seconds, minutes, or even hours. If information is encoded into the state of such spins, their long-lived coherence can become a resource for future computing or cryptography systems whose computational power or information security is fundamentally based on the laws of quantum mechanics. At the same time, the quantum states of spins can be exquisitely sensitive probes of their surroundings, creating opportunities to study the nature of their local environment or measure external electromagnetic fields with high precision. To realize spin-based quantum devices, one must find ways to control spins, prepare and detect their states, and engineer interactions between them without sacrificing their coherent quantum character. Optically-active defects in crystalline hosts have recently emerged as a promising platform for accessing individual electronic and nuclear spins in a robust solid-state device. This NSERC grant will support research that uses defect centres to explore a remaining challenge: creating gates (controlled interactions) between different spins. The critical idea is to identify and study interaction mechanisms that could be extended to large-scale quantum systems for applications in computing or cryptography. Using magnetic and optical properties of defects in diamond, as well as exploring new materials and device geometries, the proposed projects will pursue quantum gates between long-lived solid-state spins separated by nanoscale and macroscopic distances. Additionally, this research will impact near-term applications using spins for precision magnetic sensors. This Discovery grant will also support the training and guidance of several student researchers, shaping their future careers and increasing the pool of highly-qualified scientists and researchers in Canada.

电子或原子核的微小磁矩--自旋--提供了一个物理系统，可以在非常长的时间尺度上表现出量子力学行为;在某些情况下，它们可以在几秒钟、几分钟甚至几小时内表现出连贯的演化。如果信息被编码到这种自旋的状态中，它们的长期相干性可以成为未来计算或密码系统的资源，这些系统的计算能力或信息安全性基本上是基于量子力学定律的。与此同时，自旋的量子态可以作为其周围环境的灵敏探针，为研究其局部环境的性质或高精度测量外部电磁场创造了机会。为了实现基于自旋的量子器件，人们必须找到控制自旋的方法，准备和检测它们的状态，并在不牺牲它们的相干量子特性的情况下设计它们之间的相互作用。 晶体宿主中的光学活性缺陷最近已经成为一个有前途的平台，用于在坚固的固态器件中访问单个电子和核自旋。NSERC的这项拨款将支持使用缺陷中心探索剩余挑战的研究：在不同自旋之间创建门（受控相互作用）。关键的想法是识别和研究可以扩展到大规模量子系统的相互作用机制，以应用于计算或密码学。利用金刚石缺陷的磁性和光学特性，以及探索新材料和器件几何形状，拟议的项目将在由纳米级和宏观距离分开的长寿命固态自旋之间寻求量子门。此外，这项研究将影响使用自旋的精密磁传感器的近期应用。这项发现补助金还将支持几名学生研究人员的培训和指导，塑造他们未来的职业生涯，并增加加拿大高素质科学家和研究人员的数量。