学术报告
题目: [拓扑量子计算卓越创新中心-你忍着点刚进去有点疼联合报告] Tunable superconducting coupling of quantum dots via Andreev bound states: theory and experiment
时间: 2022年06月14日 16:00
地点: 腾讯会议
报告人: Dr. Chun-Xiao Liu (刘纯骁)

Delft University of Technology, the Netherlands

腾讯会议 417-839-609 会议密码:0614

Abstract: 
Semiconductor quantum dots have proven to be a useful platform for quantum simulation in the solid state. However, implementing a superconducting coupling between quantum dots mediated by a Cooper pair has so far suffered from limited tunability and strong suppression. This has limited applications such as Cooper pair splitting and the quantum dot simulation of topological Kitaev chains. In this talk, I will introduce our proposal of mediating tunable effective couplings via Andreev bound states in a semiconductor-superconductor nanowire connecting two quantum dots. In this way it is possible to individually control both the coupling mediated by Cooper pairs and by single electrons by changing the properties of the Andreev bound states with easily accessible experimental parameters. In addition, the problem of coupling suppression is greatly mitigated. I will also talk about the most recent experimental progress following this proposal.

References:
1. arXiv:2203.00107(theory) C.-X. Liu, G. Wang, T. Dvir, and M. Wimmer (2022)
2. arXiv:2205.03458(experiment) G. Wang, T. Dvir, G.P. Mazur, C.-X. Liu, et. al. (2022)