Robust interface between flying and topological qubits.

Area of Science:

• Quantum Computing
• Condensed Matter Physics

Background:

• Hybrid quantum architectures combine conventional and topological qubits for enhanced robustness and universality.
• A significant challenge is the energy mismatch between these qubit types, hindering quantum information exchange.

Purpose of the Study:

• To propose a novel microwave photonic quantum bus for strong coupling between topological and conventional qubits.
• To address the energy mismatch problem using an external driving field.

Main Methods:

• Utilizing a microwave photonic quantum bus to mediate coupling.
• Employing tight-binding simulation and perturbation theory.
• Investigating the robustness of Majorana fermion energy splitting in topological qubits.

Main Results:

• Demonstrated a method to compensate for energy mismatch between qubit types.
• Showcased the robustness of topological qubits (defined by Majorana fermions) against perturbations.
• Established a robust interface for quantum information transfer between flying and topological qubits.

Conclusions:

• The proposed quantum bus effectively couples conventional and topological qubits, overcoming energy mismatch issues.
• The scheme provides a robust interface for quantum information exchange.
• The quantum bus facilitates the generation of multipartite entangled states with topological qubits.