Towards a Multi-site Kitaev Chain on Semiconducting-Superconducting Hybrid Nanowires

Master thesis (2022)

Authors

X. LI Electrical Engineering, Mathematics and Computer Science

Contributors

A. Bordin QRD/Kouwenhoven Lab - QuTech Advanced Research Centre (mentor)
T. Dvir QRD/Kouwenhoven Lab - QuTech Advanced Research Centre (mentor)
M.T. Wimmer QN/Wimmer Group - AS (mentor)
Faculty
Electrical Engineering, Mathematics and Computer Science, Electrical Engineering, Mathematics and Computer Science
Copyright: © 2022 XIANG LI
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Published Date

08-12-2022

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

A minimal Kitaev chain can be realized by coupling two quantum dots to a superconductor on both sides. Andreev Bound States inside the superconductor mediate two types of interdot couplings: Cross Andreev Re ection (CAR) and Elastic Co-tunneling (ECT). Spin-orbit interaction (SOI) enables equal strengts of CAR and ECT, where Majorana Bound States with a quadratic protection emerge. By extending the chain to more dots, the protection is predicted to become stronger. In this project, semiconducting-superconducting InSb nanowires provide both SOI and superconductivity. We develop systematic procedures to tune a two-site device to hold Majorana Bound States. Next, quantum transport processes on a three-site device are studied. Sequential processes combining CAR and ECT are observed.

Files

MSc_Thesis.pdf
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