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.

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Cited by in corpus (41)

• Majorana nanowires for topological quantum computation
• Parity-to-charge conversion in Majorana qubit readout
• Majorana-like Coulomb spectroscopy in the absence of zero bias peaks
• Spin-resolved thermal signatures of Majorana-Kondo interplay in double quantum dots
• Topological superconductivity and Majorana states in low-dimensional systems
• Violation of the Wiedemann-Franz law in the Topological Kondo model
• Full parity phase diagram of a proximitized nanowire island
• Single-shot fabrication of semiconducting-superconducting nanowire devices
• Fusion rules in a Majorana single-charge transistor
• Experimental review on Majorana zero-modes in hybrid nanowires
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• A flux-controlled two-site Kitaev chain
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