Hyperpolarized Multi-Spin Systems as Qubits for Quantum Information Science

超极化多自旋系统作为量子信息科学的量子位

• 批准号: 1900422
• 负责人: Michael Wasielewski
• 金额: $ 56.68万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1900422&HistoricalAwards=false
• 关键词: Hyperpolarized; Multi; Spin; Systems; Qubits

In this project, funded by the Chemical Structure, Dynamics, and Mechanisms-B Program of the Chemistry Division, Professor Michael R. Wasielewski of the Department of Chemistry at Northwestern University is developing a fundamental understanding of how to control charge and spin transport through organic molecules. Such control is critical to the future of electronics, computers, and quantum information science (QIS). The degree of control over molecular structure and properties afforded by this research makes it possible to develop molecules and materials that take advantage of electron spin changes to implement new strategies for computer of the future that may have speeds and encryption technologies far beyond the current models. The Wasielewski research group volunteers in the Science In The Classroom program (SITC), with 3rd/4th-graders at an elementary school in an historically under-served and diverse community in Chicago. Approximately one third of the classes served by SITC are multilingual, and learn English as a second language alongside the regular curriculum. By volunteering with the same class of students for the academic year, Northwestern students mentor and inspire young scientists. The research team also participates in the program "Letters to a Pre-Scientist" which focuses on creating personal connections between middle school students from underprivileged schools and scientists to encourage the younger students to consider science as a career by writing letters as a pen pals. Photogenerated molecular excited states and electron transfer reactions are playing an increasing role in quantum information science (QIS). This project will address several goals based on what are known in the QIS field as the DiVincenzo criteria, which are essential for exploiting multi-radical assemblies as spin qubits that target QIS applications. Professor Wasielewski and his group use two spin-selective photophysical processes to hyperpolarize electron spins to generate well-defined initial quantum states of spin qubits and determine the dephasing mechanisms of the spin qubits. The team then manipulates and addresses specific spin qubits to demonstrate quantum gates and uses both microwave and visible photon pulses to move (teleport) spin coherences between two sites. Finally, the team establishes strategies for scalable spin qubit arrays based on DNA hairpin structures. They use laser excitation to generate the initial hyperpolarized spin qubits and time-resolved pulse electron paramagnetic resonance (pulse-EPR) spectroscopy to observe, manipulate and control the coherent spin states of these qubits.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.

在该项目中，由化学部的化学结构，动力学和机制-B计划资助，西北大学化学系的Michael R. Wasielewski教授正在对如何通过有机分子进行控制和旋转运输的基本了解。 这种控制对于电子，计算机和量子信息科学（QIS）的未来至关重要。这项研究所提供的对分子结构和特性的控制程度使得开发分子和材料，以利用电子自旋变化来实施未来计算机的新策略，这些策略可能具有速度和加密技术，远远超出了当前模型。 Wasielewski研究小组在课堂课程（SITC）的志愿者中，在芝加哥历史悠久和多元化社区的一所小学中，三年级/4年级的学生。 SITC提供的课程中约有三分之一是多语言，并且将英语作为第二语言与常规课程一起学习。通过在学年的同一阶层学生的志愿者中，西北学生的导师并激发了年轻科学家。研究小组还参加了“致科学家的信”计划，该计划着重于在贫困学校和科学家之间建立个人联系，以鼓励年轻学生通过将信件写为笔友，以将科学视为职业。光生的分子激发态和电子转移反应在量子信息科学（QIS）中起着越来越多的作用。该项目将根据QIS字段中已知的Divincenzo标准解决多个目标，这对于将多自由基组件作为针对QIS应用的旋转量表至关重要。 Wasielewski教授和他的小组使用两个自旋选择性的光物理过程来超极化电子旋转，以生成定义明确的自旋Qubits的初始量子状态，并确定自旋Qubits的脱位机理。 然后，团队操纵并解决特定的自旋量子，以展示量子门，并使用微波和可见的光子脉冲移动（传送）两个位点之间的旋转相干。 最后，团队基于DNA发夹结构建立了可扩展的自旋量子阵列的策略。他们使用激光激发来生成最初的超极化旋转Qub和时间分辨的脉冲电子顺磁共振（Pulse-EPR）光谱，以观察，操纵和控制这些Qubits的连贯的自旋状态。该奖项反映了NSF的法定任务，并通过评估基金会的MERITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL和BRODITIAL。

项目成果

CNOT gate operation on a photogenerated molecular electron spin-qubit pair

• DOI: 10.1063/1.5128132
• 发表时间: 2020-01-07
• 期刊: JOURNAL OF CHEMICAL PHYSICS
• 影响因子: 4.4
• 作者: Nelson, Jordan N.;Zhang, Jinyuan;Wasielewski, Michael R.
• 通讯作者: Wasielewski, Michael R.

Effect of the Time Delay between Spin State Preparation and Measurement on Electron Spin Teleportation in a Covalent Donor–Acceptor–Radical System

自旋态准备和测量之间的时间延迟对共价供体-受体-自由基系统中电子自旋隐形传态的影响

• DOI: 10.1021/acs.jpclett.1c03780
• 发表时间: 2022
• 期刊: The Journal of Physical Chemistry Letters
• 作者: Bancroft, Laura;Qiu, Yunfan;Krzyaniak, Matthew D.;Wasielewski, Michael R.
• 通讯作者: Wasielewski, Michael R.

Radically Enhanced Dual Recognition

• DOI: 10.1002/anie.202109647
• 发表时间: 2021-09-07
• 期刊: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
• 影响因子: 16.6
• 作者: Chen, Xiao-Yang;Mao, Haochuan;Stoddart, J. Fraser
• 通讯作者: Stoddart, J. Fraser

Controlling the Dynamics of Three Electron Spin Qubits in a Donor–Acceptor–Radical Molecule Using Dielectric Environment Changes

利用介电环境变化控制供体-受体-自由基分子中三个电子自旋量子位的动力学

• DOI: 10.1021/acs.jpclett.1c00077
• 发表时间: 2021
• 期刊: The Journal of Physical Chemistry Letters
• 作者: Mao, Haochuan;Young, Ryan M.;Krzyaniak, Matthew D.;Wasielewski, Michael R.
• 通讯作者: Wasielewski, Michael R.

TetrazineBox: A Structurally Transformative Toolbox

• DOI: 10.1021/jacs.0c01114
• 发表时间: 2020-03-18
• 期刊: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
• 影响因子: 15
• 作者: Guo, Qing-Hui;Zhou, Jiawang;Stoddart, J. Fraser
• 通讯作者: Stoddart, J. Fraser