Tunable interfaces for realizing universal quantum computation with topological qubits

TL;DR

This paper introduces tunable interfaces between topological qubits and other quantum systems, enabling universal quantum computation by implementing arbitrary single-qubit gates and nontrivial two-qubit gates beyond braiding.

Contribution

It proposes two tunable interfaces for topological qubits that facilitate universal quantum gates, expanding capabilities beyond traditional braiding methods.

Findings

Tunable interface with superconducting qubits for single-qubit gates.

Interface with microwave cavity for nontrivial two-qubit gates.

Potential to serve as building blocks for universal quantum computation.

Abstract

We propose to implement tunable interfaces for realizing universal quantum computation with topological qubits. One interface is between the topological and superconducting qubits, which can realize arbitrary single-qubit gate on the topological qubit. When two qubits are involved, the interface between the topological qubits and a microwave cavity can induce a nontrivial two-qubit gate, which can not be constructed based on braiding operations. The two interfaces, being tunable via an external magnetic flux, may serve as the building blocks towards universal quantum computation with topological qubits.