D-Wave tests entanglement of dual-rail qubits

Quantum computing firm D-Wave has advanced its development of dual-rail qubit technology. On Wednesday, the company published a paper in Nature detailing the successful entanglement of two such qubits, a significant step in its efforts to enhance quantum computation reliability.

The dual-rail qubits, which D-Wave is developing in partnership with its acquired company Quantum Circuits, aim to simplify error detection and correction. This approach differs from many other qubit types used in gate-based quantum computers, offering potential for more stable quantum computing solutions.

While D-Wave was initially known for developing quantum annealers, the company has in recent years expanded into hardware development for gate-based quantum computers. Its prior work with fluxonium qubits, combined with this new dual-rail approach, indicates a strategic shift toward more versatile quantum computing capabilities.

Demonstrating successful entanglement is a critical prerequisite for executing more complex quantum algorithms. D-Wave's research confirms that the key feature of dual-rail qubits—their ease of detection—is maintained during entanglement, which is crucial for error correction.