Collaborative Research: High-dimensional quantum states in two-dimensional material quantum dots

合作研究：二维材料量子点中的高维量子态

• 批准号: 2105139
• 负责人: Fan Zhang
• 金额: $ 24万
• 依托单位: University of Texas at Dallas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2105139&HistoricalAwards=false
• 关键词: Collaborative; Research; dimensional; quantum; states

Nontechnical Abstract:This collaborative project studies special materials known as two-dimensional materials such as metal chalcogenides. Recent predictions indicate that these materials have interesting properties. The project aims to develop these properties using externally applied electric and magnetic fields in order to gain knowledge that will promote development of quantum information processing and quantum computing technologies. The project is integrated with educational activities to train graduate students and involve undergraduate and pre-college students in research. The project also enables the PIs to continue their successful mentoring of members from underrepresented groups.Technical Abstract:A basic building block of quantum circuits is the quantum bit or qubit. Recent recognition that higher-dimensional quantum states known as qudits have many potential advantages towards quantum information processing has generated much focus on this topic. These pertain to areas such as quantum simulation, quantum communications, fundamental tests of quantum mechanics, and improved quantum error correction. This project uses two-dimensional metal chalcogenides’ unique band structures comprising multiple valleys to realize high-dimensional quantum qudit states based on multiple flavor degrees of freedom. These materials have a predicted flavor SU(3) symmetry, of particular interest because of the analogy to the quark model in particle physics, and this symmetry is extremely rare in condensed matter systems. The project experimentally tests predictions for novel tunable Kondo effects and Coulomb blockade behavior emerging from this symmetry. The project also performs experiments aimed at manipulating these flavor states to develop qudits towards quantum information processing based on flavortronics. These research activities are coupled with a parallel theoretical effort that informs the experimental one, leading to a synergistic effort aimed at the development of high-dimensional quantum states based on beyond-graphene two-dimensional materials.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.

非技术摘要：该协作项目研究特殊材料，称为二维材料，例如金属辣椒剂。最近的预测表明，这些材料具有有趣的特性。该项目旨在使用外部应用的电场和磁场来开发这些属性，以获取知识，以促进量子信息处理和量子计算技术的开发。该项目与教育活动集成在一起，以培训研究生，并让本科生和大学学生参与研究。该项目还使PIS能够继续从代表性不足的组中成功地对成员进行成功的心理。技术摘要：量子电路的基本构建块是量子位或定量。最近认识到，被称为量化的高维量子状态在量子信息处理中具有许多潜在的优势，这使人们非常关注此主题。这些与量子模拟，量子通信，量子力学的基本测试以及改善量子误差校正等领域有关。该项目使用二维金属辣椒剂的独特带结构完成了多个山谷，以基于多种风味的自由度来实现高维量子量子定量状态。这些材料具有预测的味道SU（3）对称性，特别是与夸克相比，该项目的实验测试了对新型可调kondo效应的预测，并且从这种对称性中出现了库仑封锁行为。该项目还进行了旨在操纵这些风味状态的实验，以基于风味的味道来开发量子信息处理。这些研究活动与平行的理论努力相结合，为实验性提供了信息，从而导致了基于超法二维材料的高维量子状态的协同努力。该奖项反映了NSF的法定任务，并通过基金会的知识优点和广泛的criperia criperia criperia criperia criperia criperia criperia criperia criperia criperia criperia criperia criperia criperia criperia均被认为是宝贵的支持。

项目成果

Uncovering Topological Edge States in Twisted Bilayer Graphene

揭示扭曲双层石墨烯中的拓扑边缘态

• DOI: 10.1021/acs.nanolett.2c01481
• 发表时间: 2022
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Fortin-Deschênes, Matthieu;Pu, Rui;Zhou, Yan-Feng;Ma, Chao;Cheung, Patrick;Watanabe, Kenji;Taniguchi, Takashi;Zhang, Fan;Du, Xu;Xia, Fengnian
• 通讯作者: Xia, Fengnian

Geometric deep optical sensing

• DOI: 10.1126/science.ade1220
• 发表时间: 2023-03-17
• 期刊: SCIENCE
• 影响因子: 56.9
• 作者: Yuan, Shaofan;Ma, Chao;Xia, Fengnian
• 通讯作者: Xia, Fengnian

Evidence for Dirac flat band superconductivity enabled by quantum geometry

• DOI: 10.1038/s41586-022-05576-2
• 发表时间: 2023-02
• 期刊: Nature
• 影响因子: 64.8
• 作者: Haidong Tian;Xue-Jian Gao;Yuxin Zhang;S. Che;Tianyi Xu;Patrick Cheung;Kenji Watanabe;T. Taniguchi;M. Randeria;Fan Zhang;C. N. Lau;M. Bockrath

Impact of Electric Field Disorder on Broken-Symmetry States in Ultraclean Bilayer Graphene

电场无序对超净双层石墨烯破缺对称态的影响

• DOI: 10.1021/acs.nanolett.2c02119
• 发表时间: 2022
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Geisenhof, Fabian R.;Winterer, Felix;Seiler, Anna M.;Lenz, Jakob;Zhang, Fan;Weitz, R. Thomas
• 通讯作者: Weitz, R. Thomas

Evidence of a room-temperature quantum spin Hall edge state in a higher-order topological insulator

高阶拓扑绝缘体中室温量子自旋霍尔边缘态的证据

• DOI: 10.1038/s41563-022-01304-3
• 发表时间: 2022-07-14
• 期刊: NATURE MATERIALS
• 影响因子: 41.2
• 作者: Shumiya, Nana;Hossain, Md Shafayat;Hasan, M. Zahid
• 通讯作者: Hasan, M. Zahid