Interface Between Topological and Superconducting Qubits

TL;DR

This paper proposes a coherent interface between topological and superconducting qubits, enabling quantum information transfer via controlled interactions involving Majorana fermions and flux qubits.

Contribution

It introduces a novel scheme for coupling topological and superconducting qubits through a controllable phase gate based on Majorana fermions.

Findings

The interface allows coherent quantum state transfer.

Controlled phase gates can be implemented with pulsed interactions.

The scheme integrates topological and superconducting qubit technologies.

Abstract

We propose and analyze an interface between a topological qubit and a superconducting flux qubit. In our scheme, the interaction between Majorana fermions in a topological insulator is coherently controlled by a superconducting phase that depends on the quantum state of the flux qubit. A controlled phase gate, achieved by pulsing this interaction on and off, can transfer quantum information between the topological qubit and the superconducting qubit.