Coherent transport through a Majorana island in an Aharonov-Bohm interferometer
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, could also be observed, suggesting additional non-Majorana mechanisms for 1e transport through these moderately short wires.
Keywords
Cite
@article{arxiv.1902.07085,
title = {Coherent transport through a Majorana island in an Aharonov-Bohm interferometer},
author = {A. M. Whiticar and A. Fornieri and E. C. T. O'Farrell and A. C. C. Drachmann and T. Wang and C. Thomas and S. Gronin and R. Kallaher and G. C. Gardner and M. J. Manfra and C. M. Marcus and F. Nichele},
journal= {arXiv preprint arXiv:1902.07085},
year = {2020}
}