Abstract
Surface acoustic waves are vibrations propagating on the surface of a material, widely used in classical electronics. In recent years, they have attracted growing interest as a means of linking distant quantum systems, such as spins or semiconductor qubits. In our work, we use superconducting qubits to emit and reabsorb single phonons, enabling quantum states to be transferred and remote entanglement to be generated between two qubits. We have also been able to demonstrate two-phonon entanglement and perform a quantum eraser experiment with sound waves, illustrating their potential for quantum sensing.
