Phase Signature of Topological Transition in Josephson Junctions.
Matthieu C. Dartiailh,William Mayer,Joseph Yuan,Kaushini Wickramasinghe,Alex Matos-Abiague,Igor Žutić,Javad Shabani +6 more
TLDR
Embedding two gate-tunable Al/InAs Josephson junctions in a loop geometry confirms that the signatures of a topological transition are compatible with the emergence of Majorana bound states.Abstract:
Topological superconductivity holds promise for fault-tolerant quantum computing. While planar Josephson junctions are attractive candidates to realize this exotic state, direct phase measurements as the fingerprint of the topological transition are missing. By embedding two gate-tunable $\mathrm{Al}/\mathrm{InAs}$ Josephson junctions in a loop geometry, we measure a $\ensuremath{\pi}$ jump in the junction phase with an increasing in-plane magnetic field ${\mathbit{B}}_{\ensuremath{\parallel}}$. This jump is accompanied by a minimum of the critical current, indicating a closing and reopening of the superconducting gap, strongly anisotropic in ${\mathbit{B}}_{\ensuremath{\parallel}}$. Our theory confirms that these signatures of a topological transition are compatible with the emergence of Majorana bound states.read more
Citations
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Majorana bound states in semiconducting nanostructures
TL;DR: In this article, the authors give a pedagogical introduction to Majorana bound states (MBSs) arising in semiconducting nanostructures, where the Majorana wave functions can be obtained explicitly by standard methods.
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Phase Control of Majorana Bound States in a Topological X Junction.
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TL;DR: In this article, a planar Josephson junctions (JJs) platform for topological superconductivity was proposed, where external flux control of the superconducting phase difference can generate and manipulate multiple MJs pairs to probe non-Abelian statistics.
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