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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).


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天津大学理学院 量子交叉研究中心   地址:天津津南区 雅观路135号 天津大学北洋园校区32楼146 
Center for Joint Quantum Studies, School of Science, Tianjin University     Address : Yaguan Road 135, Jinnan District, 300350 Tianjin, P. R. China