【学术视频】The Kavli ITS workshop - Majorana Modes | 清华大学张浩教授

图 | 张浩教授

题   目：Majorana Nanowires: Progress and Challenges

报告人：张浩

单   位：Tsinghua University

时   间：2019年1月8日-11日

地   点：University of Chinese Academy of Sciences

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报告摘要

A semiconductor nanowire coupled to a superconductor can be tuned into a topological superconductor with two Majorana zero-modes localized at the wire ends. Tunneling spectroscopy inelectrical transport is the primary tool to identify the presence of Majorana zero-modes, which manifests itself as a zero-bias peak (ZBP) in thedifferential-conductance. The Majorana ZBP-height is predicted to be quantized at the universal conductance value of 2e2/h at zero temperature. Previous experiments, however, have shown ZBPs much smaller than 2e2/h. In this talk, Iwill show how the experimental progress gradually leads to the quantization ofthe Majorana conductance. Finally I will discuss the progress and challenge towards the first topological qubit based on these Majorana zero modes. 

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个人简介

张浩，清华大学物理系副教授。其研究领域为：实验凝聚态物理；低温低维半导-超导体系中量子输运；微纳米器件的加工和制备；马约拉纳物理和拓扑量子计算。

会议简介

The Kavli ITS workshop on “Majorana Modes in Topological Superconductors” was held at the Kavli Institute for Theoretical Sciences (Kavli ITS) at UCAS in Beijing from January 8-11, 2019. The workshop mainly focuses on the realization and application of elusive Majorana modes in topological superconductors.

Majorana particles, which are their own antiparticles, have been of considerable interest for quantum computing in solid state systems since the zero-bias peak of the conductance was observed in the semiconductor nanowires. Now there are multiple experimental hints to support the potential existence of the Majorana states possessing zero energy. Since Majorana states can form qubits for quantum computations, once the Majorana states are able to be fully controlled and manipulated, the number of the Majorana qubits can be scalable to accelerate the speed of the quantum computation.

The scope of this workshop is to discuss the recent topics in Majorana bound states and Chiral Majorana edge modes in class D, aiming at promoting new collaborations among participants and seeking practical implementations to use Majorana modes for quantum computation. Furthermore, in the workshop, there will be a discussion session focusing on Majorana physics in the vortices of the topological superconductors.

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