"Our work introduces a new concept in which phonons act as a quantum bus, enabling distant qubits to exchange quantum information while remaining fully compatible with semiconductor technology."
Hole spin qubits combine long quantum coherence times — how long they can retain quantum information — with the ability to communicate using electron impulses in control systems.
But they struggle to form bonds and share quantum information with qubits they don't directly neighbor.
By utilizing phonons as the connections, this technique offers a versatile interface for hybrid quantum systems — conventional computers with quantum computing functionality.
This could enable coherent interconnection of semiconductor spin qubits with other quantum platforms, such as cloud-based quantum computing.