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(Lunch Seminar) Manifestation of Chiral Anomaly in Majorana-Josephson Devices
2019-04-09  【】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

Lunch Seminar

Title

题目

Manifestation of Chiral Anomaly in Majorana-Josephson Devices

Speaker

报告人

P. Kotetes

Affiliation

所在单位

中科院理论物理所

Date

日期

2019年4月9日(周二)中午12:00
 

Venue

地点

理论所主楼322报告厅

Abstract

摘要

In this talk, I will demonstrate how to design various nonstandard types of Andreev-bound-state (ABS) dispersions in Josephson junctions consisting of topological superconductors. Here, the ABSs constitute composite quasiparticles, constructed from zero-energy Majorana bound states. As I will discuss, while the resulting ABS dispersions are mainly 2π-periodic, they still feature multiple crossings which are protected by the conservation of fermion parity. This is a remarkable finding, since such crossings have been so far viewed as a unique feature of 4π-periodic dispersions. Even more, considering networks of coupled junctions of this type, opens the door for topological band structures with nodes or Weyl points in synthetic dimensions, as well as the realization of chiral anomaly. This also allows for fermion-parity pumping with a cycle set by the ABS-dispersion details. The possible experimental demonstration of ABS engineering in these devices, will further unveil new paths for the detection of chiral anomaly and the underlying Majorana quasiparticles.

Contact Person

所内联系人

Sen Zhou
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