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Bottom-up grown nanowire quantum devices

Published online by Cambridge University Press:  09 May 2019

Erik Bakkers
Erik Bakkers*
Affiliation:
Department of Applied Physics, Eindhoven University of Technology, The Netherlands; e.p.a.m.bakkers@tue.nl
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Abstract

A quantum computer can outperform classical computers for certain tasks. The general challenge to realize a quantum computer is to solve decoherence, which is due to coupling of a quantum state with the local environment. One possible way to overcome decoherence is to use a topological quantum state. Topologically protected states are expected to have long coherence times. In a topological quantum computer, the information is carried by nonlocal Majorana states. Such states can be engineered in a semiconductor nanowire, which has strong spin–orbit interactions, coupled to a superconductor. The first signatures of Majorana states have been observed recently. In order to substantiate the existence of Majorana states and use them as qubits, an exchange—or braiding—operation of these states has to be performed. The current challenge is to improve the quality of the materials and interfaces. Recent progress toward improved Majorana signals using materials science advances is reviewed in this article.

Keywords

nanoscalenanostructuremetalorganic depositionsuperconductingsemiconducting
Type
Technical Feature
Information
MRS Bulletin , Volume 44 , Issue 5: Acoustic Processes in Materials , May 2019 , pp. 403 - 410
Copyright
Copyright © Materials Research Society 2019 

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Footnotes

The following article is based on a Symposium X (Frontiers of Materials Research) presentation given at the 2018 MRS Fall Meeting in Boston, Mass.

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