华中科技大学国家脉冲强磁场科学中心
学校主页 | English

科学研究

Research

学术交流

当前位置: 首页 > 科学研究 > 学术交流 > 正文

Intrinsic hysteresis of topological Josephson junctions with Majorana zero modes

发布日期:2019-11-13    作者:     来源:     点击:

题目:Intrinsic hysteresis of topological Josephson junctions with Majorana zero modes

报告人:王志 副教授

        中山大学物理学院

时间:20191114日(星期四)下午14:30

地点:国家脉冲强磁场科学中心C204


报告摘要:

Topological Josephson junctions are distinct from conventional ones in that they host Majorana bound states which form a two-level quantum system, the so-called Majorana qubit. The energies of the two levels are depending on the Josephson phase across the junction,while reversely the effective potential for the Josephson phase is controlled by the wave function of the Majorana qubit. We build a quantum resistively shunted junction model to describe the correlation between the Majorana qubit and the classical Josephson phase. Within this model, we study the I-V characteristics of the junction, and demonstrate an intrinsic hysteric behavior which is independent of the parameters of the junction. Our results are quantitatively in agreement with recent experiments.


报告人简介:

王志,中山大学物理学院副教授。2010年于北京师范大学获得博士学位,2010年至2012年在日本物质材料研究机构做博士后,2012年入职中山大学任副教授,2017年至2018年在得克萨斯大学奥斯汀分校做访问学者。研究领域包括高温超导电性理论、介观超导体系、拓扑超导体系等,已在PRLPRB等期刊发表论文20余篇。