Majorana Superconducting Qubit

TL;DR

This paper introduces a new type of quantum bit called the Majorana superconducting qubit, which combines the advantages of topological and superconducting qubits for scalable and robust quantum computing.

Contribution

It proposes a practical platform for universal quantum computation using conventional superconductors to manipulate topological Majorana qubits with on-demand tunnel coupling control.

Findings

Demonstrates a method for manipulating Majorana qubits via tunnel couplings.

Shows potential for scalable and error-resistant quantum computation.

Provides a realistic approach combining topological robustness with superconducting technology.

Abstract

We propose a platform for universal quantum computation that uses conventional $s$-wave superconducting leads to address a topological qubit stored in spatially separated Majorana bound states in a multi-terminal topological superconductor island. Both the manipulation and read-out of this "Majorana superconducting qubit" are realized by tunnel couplings between Majorana bound states and the superconducting leads. The ability of turning on and off tunnel couplings on-demand by local gates enables individual qubit addressability while avoiding cross-talk errors. By combining the scalability of superconducting qubit and the robustness of topological qubits, the Majorana superconducting qubit may provide a promising and realistic route towards quantum computation.