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Squeezing and Multimode Entanglement of Surface Acoustic Wave Phonons

2022; American Physical Society; Volume: 3; Issue: 1 Linguagem: Inglês

10.1103/prxquantum.3.010312

2691-3399

Gustav Andersson, Shan W. Jolin, Marco Scigliuzzo, Riccardo Borgani, Mats O. Tholén, J. C. Rivera Hernández, V. S. Shumeǐko, David B. Haviland, Per Delsing,

Quantum and electron transport phenomena

Exploiting multiple modes in a quantum acoustic device could enable applications in quantum information in a hardware-efficient setup, including quantum simulation in a synthetic dimension and continuous-variable quantum computing with cluster states.We develop a multimode surface acoustic wave (SAW) resonator with a superconducting quantum interference device (SQUID) integrated in one of the Bragg reflectors. The interaction with the SQUID-shunted mirror gives rise to coupling between the more than 20 accessible resonator modes. We exploit this coupling to demonstrate two-mode squeezing of SAW phonons, as well as four-mode multipartite entanglement. Our results open avenues for continuous-variable quantum computing in a compact hybrid quantum system.