报告题目：Majorana Fermions in the Solid State and Topological Quantum Computation（固态系统中的Majorana费米子与拓扑量子计算）

报告人：Hongqi Xu（徐洪起）

（Beijing Key Laboratory of Quantum Devices, Peking University, Beijing 100871, China）

报告时间：2018年9月13日（周四）上午10：00

报告地点：物理学院新楼多功能厅

报告摘要：

The search for Majorana fermions in solid state systems is one of paramount research tasks in modern physics today. Majorana fermions are an elusive class of fermions that are their own antiparticles. Although an extensive effort has been made worldwide in particle physics, Majorana fermions have so far not been convincingly discovered in free space. In recent years, numerous theoretical proposals for probing Majorana fermion states in solid state systems have been suggested, ranging from exploring ν = 5/2 fractional quantum Hall systems, to exploring chiral p-wave superconductor systems, and to exploring hybrid systems of topological insulator thin films in contact to s-wave superconductors. The most recent proposals are to explore the topological superconducting phase of a strong spin−orbit coupled semiconductor nanowire in the proximity of an s-wave superconductor. These proposals have stimulated waves of search for Majorana fermions in solid state. In this talk, the current achievements in the experimental search for Majorana fermions in solid state systems will be reviewed. A view of future experimental directions in pursuit of Majorana fermions in the solid state for topological quantum computation will also be briefly presented and discussed.

报告人简介：

徐洪起 瑞典Lund大学凝聚态物理博士，国家科技部重大科学研究计划首席科学家，国家基金委重大研究计划项目负责人。于1993 年获聘到Lund 大学工作至2014年，历任助理教授 (1995-2001)、副教授 (2001-2003)和教授(2003-2014)。2010年获聘入职北京大学，在信息科学技术学院任讲席教授（chair professor），现担任其创建的“半导体纳米结构与量子器件实验室”和“固态量子器件北京市重点实验室”负责人。从事的科学研究领域包括：半导体纳米结构物理与光电性质的实验与理论研究；纳电子学器件与自旋电子学器件的制作、物理与应用研究；新型纳米线LED 和光伏器件的原理与制作技术研究；固态量子信息器件的制备、物理机制与应用研究；低维凝聚态多体物理，包括强关联、自旋纠缠等多体物理现象的实验与理论研究；固态系统中Majorana 费米子的实验与理论研究等。

邀请人：徐红星教授