报告题目：Unveiling nontrivial fusion rule of Majorana zero mode using a fermionic mode

报告人： 刘杰 教授（西安交通大学）

报告时间：2023年06月27日（星期二）16：00-17：30

报告地点：腾讯会议ID：368-4368-9521

报告摘要：

Fusing Majorana zero modes leads to multiple outcomes, a property being unique to non-Abelian anyons. Successful demonstration of this nontrivial fusion rule could serve as a smoking-gun evidence for its existence in topological superconducting systems. Here we show that this can be done by simply attaching a fermionic mode to a single Majorana zero mode. Through modulation of the energy level of this fermionic mode as well as its coupling with the Majorana mode in different sequences, the Majorana modes can be fused in different orders and induce distinct charge transfer results. Such charge transfer results can be detected through charge sensing method or current measurement. Moreover, the charge transfer would experience an abrupt change in the presence of trivial Andreev bound states when fermion parity is changed. This provides a feasible way to distinguish Majorana modes from trivial Andreev bound states. In the end, we demonstrate our proposal in a nanowire-based topological superconductor coupled to a quantum dot, where the dot level and coupling strength are tunable in experiments.。

报告人简介：

刘杰， 西安交通大学物理学院教授，2011年于中国科学院物理研究所获得博士学位。主要探究拓扑物质在 拓扑量子计算中的应用，总共在该领域发表PRL，NSR，PRB等学术文章三十余篇。主持基金委重点研发培育项目一项、面上项目两项。