Quantum Information Transfer between Topological and Superconducting Qubits

TL;DR

This paper proposes a controllable scheme for strong quantum coupling between topological and superconducting qubits, enabling high-fidelity quantum state transfer and entanglement distribution in a hybrid system.

Contribution

It introduces a novel phase-dependent coupling mechanism allowing coherent interactions between topological and flux qubits, facilitating quantum operations in hybrid quantum systems.

Findings

High-fidelity quantum state transfer demonstrated

Entanglement distribution between qubits achieved

Phase control enables tunable coupling strength

Abstract

We describe a scheme that enables a strong Jaynes-Cummings coupling between a topological qubit and a superconducting flux qubit. The coupling strength is dependent on the phase difference between two superconductors on a topological insulator and may be expediently controlled by a phase controller. With this coherent coupling and single-qubit rotations arbitrary unitary operations on the two-qubit hybrid system of topological and flux qubits can be performed. Numerical simulations show that quantum state transfer and entanglement distributing between the topological and superconducting flux qubits may be performed with high fidelity.