报告题目: Validating the Bogoliubov-de Gennes Treatment for Majorana Conductances in Three-Terminal Transports

报告人：冯伟 副教授 （天津大学量子交叉研究中心）

报告时间：2020年10月22日 15:30 - 16:30

报告地点：在线报告（腾讯会议ID：450 928 322 , 密码：201022 ）

报告摘要: 

In order to demonstrate the nature of nonlocality of the Majorana zero modes (MZMs), Majorana master equation (MME) will be given for a two-lead (three-terminal) setup of transport. This MME, beyond the limitation under the Born-Markov approximation, is also applicable for small bias voltage. Very importantly, the MME involves only the number-states of the complex fermion converted from the MZMs, but not involving the redundant negative-energy states in the BdG treatment. Based on the MME, we carry out the representative results of current and show that only a modified BdG treatment can consistently recover the same results, in particular the non-vanishing teleportation and Cross Andreev Reflections even when the coupling energy of the MZMs approaches 0. We further carry out new predictions for the Majorana conductance associated with the three-terminal device and different coupling energy scaling behaviors of the “teleportation” conductance.

参考文献: 

[1] Wei Feng, Lupei Qin, Jinshuang Jin, and Xin-Qi Li, arXiv:  2008.04807.

[2] Xinqi Li and Luting Xu, Phys. Rev. B 101, 205401 (2020).