Deterministic multi-phonon entanglement between two mechanical resonators on separate chips PART 1

Quantum acoustics have emerged as a promising avenue for harnessing phonons in the context of quantum information processing and storage. Several experiments have demonstrated the feasibility of manipulating and discerning phononic states within mechanical resonators integrated with superconducting quantum circuits. In this study, we present deterministic entanglement generation and subsequent tomographic analysis for two distinct surface acoustic resonators situated on separate chips, with the usage of two superconducting qubits. Our results open the door for more advanced quantum protocols using mechanical systems with extended lifetimes, including quantum error correction. In the first session of this presentation, we provide an overview of the device design and fabrication, device characterization, as well as a description of preparation and tomography of mechanical Bell states shared between the two acoustic resonators.