Encrypting Majorana Fermions-qubits as Bound States in the Continuum

Abstract

We theoretically investigate a topological Kitaev chain connected to a double quantum-dot (QD) setup hybridized with metallic leads. In this system we observe the emergence of two striking phenomena: (i) a decrypted Majorana fermion (MF) qubit recorded over a single QD, which is detectable by means of conductance measurements due to the asymmetrical MF-qubit leaked state into the QDs; (ii) an encrypted qubit recorded in both QDs when the leakage is symmetrical. In such a regime, we have a cryptographylike manifestation, since the MF qubit becomes bound states in the continuum, which is not detectable in conductance experiments.

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Cited by in corpus (12)

• On controlling the bound states in quantum-dot hybrid-nanowire
• Spin-dependent coupling between quantum dots and topological quantum wires
• Topological Phase Detection in Rashba Nanowires with a Quantum Dot
• Lifetime of Majorana qubits in Rashba nanowires with non-uniform chemical potential
• Majorana molecules and their spectral fingerprints
• Fano-Majorana effect and bound states in the continuum on a crossbar-shaped quantum dot hybrid structure
• Majorana bound state in the continuum: Coupling between Majorana bound state and quantum dot mediated by continuum
• Thermoelectric transport through a finite-$U$ quantum dot side-coupled to Majorana bound state
• Manipulating quantum coherence of charge states in interacting double-dot Aharonov-Bohm interferometers
• Bound states in the continuum poisoned by Majorana fermions
• Solvable model of bound states in the continuum (BIC) in one dimension
• Robust Topological Bound States in the Continuum in a Quantum Hall Bar with an Anti-dot