Coherent transport through a Majorana island in an Aharonov–Bohm interferometer

A. M. Whiticar, A. Fornieri, E. C. T. O’Farrell, A. C. C. Drachmann, T. Wang, C. Thomas, S. Gronin, R. Kallaher, G. C. Gardner, M. J. Manfra, C. M. Marcus () and F. Nichele ()
Additional contact information
A. M. Whiticar: University of Copenhagen and Microsoft Quantum Lab Copenhagen
A. Fornieri: University of Copenhagen and Microsoft Quantum Lab Copenhagen
E. C. T. O’Farrell: University of Copenhagen and Microsoft Quantum Lab Copenhagen
A. C. C. Drachmann: University of Copenhagen and Microsoft Quantum Lab Copenhagen
T. Wang: Purdue University
C. Thomas: Purdue University
S. Gronin: Purdue University
R. Kallaher: Purdue University
G. C. Gardner: Purdue University
M. J. Manfra: Purdue University
C. M. Marcus: University of Copenhagen and Microsoft Quantum Lab Copenhagen
F. Nichele: University of Copenhagen and Microsoft Quantum Lab Copenhagen

Nature Communications, 2020, vol. 11, issue 1, 1-6

Abstract: Abstract Majorana zero modes are leading candidates for topological quantum computation due to non-local qubit encoding and non-abelian exchange statistics. Spatially separated Majorana modes are expected to allow phase-coherent single-electron transport through a topological superconducting island via a mechanism referred to as teleportation. Here we experimentally investigate such a system by patterning an elongated epitaxial InAs-Al island embedded in an Aharonov-Bohm interferometer. With increasing parallel magnetic field, a discrete sub-gap state in the island is lowered to zero energy yielding persistent 1e-periodic Coulomb blockade conductance peaks (e is the elementary charge). In this condition, conductance through the interferometer is observed to oscillate in a perpendicular magnetic field with a flux period of h/e (h is Planck’s constant), indicating coherent transport of single electrons through the islands, a signature of electron teleportation via Majorana modes.

Date: 2020
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DOI: 10.1038/s41467-020-16988-x

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