Topological quantum buses: coherent quantum information transfer between topological and conventional qubits

Area of Science:

• Quantum Computing
• Condensed Matter Physics
• Quantum Information Science

Background:

• Coherent quantum information transfer is crucial for scalable quantum computing.
• Bridging topological and conventional qubits presents unique challenges due to their distinct physical properties.

Purpose of the Study:

• To propose and describe a novel quantum bus device for inter-qubit information transfer.
• To enable coherent manipulation and entanglement between topological and conventional qubits.

Main Methods:

• Utilizing a topological quantum bus based on Majorana wire networks.
• Employing the Aharonov-Casher effect for joint parity measurement of coupled qubits.
• Integrating an ancillary superconducting flux qubit to facilitate the parity measurement.

Main Results:

• Demonstrated a concrete device design for a topological quantum bus.
• Successfully measured the joint parity of a topological qubit and a semiconductor double quantum dot qubit.
• Established a pathway for creating maximally entangled states between disparate qubit types.

Conclusions:

• The proposed topological quantum bus facilitates coherent information transfer and entanglement.
• This technology is a significant step towards hybrid quantum computing architectures.
• Enables quantum state teleportation between topological and conventional quantum systems.