Manipulating Surface Acoustic Wave phonons in the Quantum Regime

Quantum computers have demonstrated potential to solve problems that are intractable for classical computers. Although current state-of-the-art quantum processors have shown promising results, they have yet to fully reach this potential. Exploring alternative approaches could accelerate progress toward this goal. Recent experiments suggest that quantum acoustic devices offer a compelling alternative, due to their compact design, support for microwave frequency operations, and compatibility with superconducting circuits and other quantum systems. In this presentation, I will discuss recent advances in controlling surface acoustic wave (SAW) devices in the quantum regime. By integrating SAW resonators with superconducting circuits, we can prepare, store, and generate multiphonon states in two physically distinct resonators. Utilizing superconducting qubits, we have performed quantum state tomography and demonstrated deterministic entanglement generation. These results open new avenues for advanced quantum protocols and quantum information processing using mechanical systems.