Kavli ITS Workshop-Majorana Modes | Ching-Kai Chiu

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 consider able 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 computation, 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.

图|Ching-Kai Chiu

题目：Majorana lattice with disorder

报告人：Ching-Kai Chiu

单位：Kavli Institute for Theoretical Sciences

时间：2019年1月8日-11日

地点：卡弗里理论科学研究所

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报告摘要

Recent scanning tunnelling spectroscopy measurement observed the zero-bias conductance peaks at the vortex cores of the topological superconductor candidates, consistent with MZM tunnelling interpretation. This year in the experiment based on the iron-based superconductor (FeTexSe1-x), Caroli-de Gennes-Matricon modes with energy higher than zero were observed near the vortex cores; hence, the observation of the zero bias peak might be tentative evidence of an isolated Majorana zero mode trapped in a vortex core. In the current experiment, the most controllable parameter is magnetic field strength adjusting the intervortex distance. The change of the magnetic field strongly affects LDOS near the vortex cores. In this talk, we theoretically study the LDOS of the vortex lattice with and without disorder as a function of the magnetic field in the presence of the Majorana modes and further predict the observable signs of the Majorana physics.

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