EAGER: BRAIDING: Collaborative Research: Manipulation of Majorana Modes in Topological Crystalline Insulator Nanowires

EAGER：编织：合作研究：拓扑晶体绝缘体纳米线中马约拉纳模式的操纵

• 批准号: 1743913
• 负责人: James Williams
• 金额: $ 15万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1743913&HistoricalAwards=false
• 关键词: EAGER; BRAIDING; Collaborative; Research; Manipulation

Non-technical Abstract:The team aims to make topological superconducting nanowires as the building blocks of new quantum computers that are more robust and energy efficient than current quantum computers. Nanodevices based on these nanowires are used to demonstrate the basic rules for quantum computations. The superconducting nanowires are made of indium doped tin telluride, and are expected to alleviate some of the challenging technical constraints imposed on a competing system, a semiconducting nanowire with large spin orbit coupling. A portion of the research is included in the undergraduate and graduate physics curriculum to inspire and encourage students to pursue research. Undergraduate students are involved in the project through senior research projects, REU programs, and summer research internships. Collaboration between Yale University and the University of Maryland at College Park provide broader networking opportunities to graduate students. Technical Abstract:The team aims to demonstrate braiding anyon world lines using indium-doped tin telluride (SnTe) topological superconductor nanowires and nanowire junctions. Indium-doped SnTe - SnTe junction nanowires are synthesized via a growth method that adapts the vapor-liquid-solid growth mechanism. Superconducting topological nanowires eliminate the need for superconducting contacts. Nanodevices using the heterojunction nanowires are be fabricated to demonstrate the signatures of Majorana fermions (MFs) at the junctions and perform fusion and braiding operations. A half quantum flux magnetic field is to be applied parallel to the nanowire to ensure the topological superconducting phase while small additional local magnetic fields are to be used to generate, manipulate, and fuse MFs. Quantum dot devices on the nanowire are used to read out the parity through the parity-to-charge conversion. The use of magnetic fields, instead of electric gating, combined with relaxed conditions for the placement of chemical potentials, represents technical advantages for this system.

非技术摘要：该团队旨在使拓扑超导纳米线成为新的量子计算机的构建块，这些量子计算机比当前的量子计算机更强大，更节能。 基于这些纳米线的纳米版本用于演示量子计算的基本规则。 超导纳米线是由掺杂锡尿酸盐制成的，有望减轻对竞争系统施加的一些具有挑战性的技术限制，这是一种与大型旋转轨道耦合的半导体纳米线。 一部分研究包括在本科和研究生物理课程中，以激发和鼓励学生进行研究。 本科生通过高级研究项目，REU计划和夏季研究实习参与该项目。 耶鲁大学和马里兰州大学公园大学之间的合作为研究生提供了更广泛的网络机会。 技术摘要：该团队旨在使用掺杂的锡醇（SNTE）拓扑超导体纳米线和纳米线连接来展示任何编织世界世界。 掺杂的SNTE-SNTE连接纳米线是通过适应蒸气 - 液体固定生长机制的生长方法合成的。 超导拓扑纳米线消除了超导接触的需求。 制造使用异性结纳米线的纳米版本，以证明连接处的Majorana Fermions（MFS）的签名并进行融合和编织操作。 半量子通量磁场应平行于纳米线应用，以确保拓扑超导相位，同时要使用少量的其他局部磁场来生成，操纵和保险丝MFS。 纳米线上的量子点设备用于通过平均电荷转换来读取奇偶校验。 磁场的使用，而不是电控，与放松的化学电位的放松条件相结合，代表了该系统的技术优势。