Photons are the quantum of light. Phonons are the quantum of sound. Studies at the Vienna University of Technology are suggesting the use of phonons to transfer quantum information. Testing is being conducted with diamond rods containing silicon placed in specific locations around carbon. By vibrating the rod, the silicon atoms form a needed quantum-mechanical bond. Through use of microwaves, the silicon is turned off and on, emitting or absorbing phonons. The resulting quantum entanglement permits quantum information to be transferred.