Squeezing and Multimode Entanglement of Surface Acoustic Wave Phonons
Journal article, 2022
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.
Author
Gustav Andersson
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
Pritzker School of Molecular Engineering
Shan W. Jolin
IQM Finland Oy
Royal Institute of Technology (KTH)
Marco Scigliuzzo
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
Riccardo Borgani
Royal Institute of Technology (KTH)
Mats O. Tholén
Intermodulation Products AB
Royal Institute of Technology (KTH)
J. C. Rivera Hernández
Royal Institute of Technology (KTH)
Vitaly Shumeiko
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
D. Haviland
Royal Institute of Technology (KTH)
Per Delsing
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
PRX Quantum
26913399 (eISSN)
Vol. 3 1 010312Wallenberg Centre for Quantum Technology (WACQT)
Knut and Alice Wallenberg Foundation (KAW 2017.0449, KAW2021.0009, KAW2022.0006), 2018-01-01 -- 2030-03-31.
Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
Other Physics Topics
Condensed Matter Physics
DOI
10.1103/PRXQuantum.3.010312