【学术视频】The Kavli ITS workshop - Majorana Modes | 清华大学刘东教授

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.

图 | 刘东教授

题   目：Topologically protected quantum computation based on Majorana: A theory perspective

报告人：刘东

单   位：清华大学

时   间：Jan. 8th-11th, 2019

地   点：University of Chinese Academy of Sciences

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报告摘要

Majorana zero modes provide a potential platform for the storage and processing of quantum information with intrinsic error rates that decrease exponentially with inverse temperature and with the length scales of the system. In the first part of the talk, I will review the recent progress and challenges in Majorana search and topological quantum computation from a theoretical point of view. In the second part of the talk, I will focus on a near term question: What is the simplest way to reveal the coherent signatures of Majorana devise? Recent experimental progresses are mostly about the Majorana resonance which cannot give their coherent information. We propose a Fu’s Majorana teleportation setup with extra energy dissipation in the tunneling processes. We find energy dissipation significantly suppresses the transport for non-Majorana incoherent tunneling, but enhance the coherent Majorana transport. Therefore, this simple setup could serve as near term coherence-detector of Majorana systems.

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个人简介

刘东，清华大学物理系教授。其主要研究方向为：1、理论量子物理和凝聚态物理；2、拓扑量子计算：物理实现和架构、拓扑量子器件的运输和量子调控、多体相互作用量子系统中的非平衡态。

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