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All-electrically tunable networks of Majorana bound states

Song-Bo Zhang, Alessio Calzona, and Björn Trauzettel
Phys. Rev. B 102, 100503(R) – Published 10 September 2020
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Abstract

Second-order topological superconductors (SOTSs) host localized Majorana fermions and provide a new platform for topological quantum computation. We propose a feasible way to realize networks based on SOTSs which allow one to nucleate and braid Majorana bound states (MBSs) in an all-electrical manner without fine-tuning. The proposed setups are scalable in a straightforward way and can accommodate any even number of MBSs. Moreover, the MBSs in the networks allow defining qubits whose states can be initialized and read out by measuring Josephson currents flowing between SOTS islands. Our proposal can be implemented in monolayers of FeTe1xSex, monolayers of 1TWTe2, and inverted Hg(Cd)Te quantum wells in proximity to conventional superconductors.

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  • Received 9 March 2020
  • Accepted 28 August 2020

DOI:https://doi.org/10.1103/PhysRevB.102.100503

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Song-Bo Zhang1, Alessio Calzona1, and Björn Trauzettel1,2

  • 1Institute for Theoretical Physics and Astrophysics, University of Würzburg, D-97074 Würzburg, Germany
  • 2Würzburg-Dresden Cluster of Excellence ct.qmat, Germany

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Issue

Vol. 102, Iss. 10 — 1 September 2020

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