Physical Sciences Division
Published February 7, 2025 | Version v1
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Deterministic multi-phonon entanglement between two mechanical resonators on separate substrates

Creators

  • 1. University of Chicago

Description

Mechanical systems have emerged as a compelling platform for applications in quantum information, leveraging advances in the control of phonons, the quanta of mechanical vibrations. Experiments have demonstrated the control and measurement of phonon states in mechanical resonators, and while dual-resonator entanglement has been demonstrated, more complex entangled states remain a challenge. Here, we demonstrate rapid multi-phonon entanglement generation and subsequent tomographic analysis, using a scalable platform comprising two surface acoustic wave resonators on separate substrates, each connected to a superconducting qubit. We synthesize a mechanical Bell state with a fidelity of F = 0.872 ± 0.002 , and a multi-phonon entangled N = 2 N00N state with a fidelity of F = 0.748 ± 0.008 . The compact, modular, and scalable platform we demonstrate will enable further advances in the quantum control of complex mechanical systems.

Data availability

Source data for the figures in the main text and supplementary information are provided. All other data related to this study are available from the corresponding author upon request. Source data are provided with this paper.

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Additional details

Identifiers

DOI
10.1038/s41467-025-56454-0
Other
oai:uchicago.tind.io:14521

Funding

Air Force Office of Scientific Research
AFOSR grant
Air Force Office of Scientific Research
AFOSR MURI grant
DARPA DSO
HR0011-24-9-0364
Army Research Office
ARO grant
National Quantum Information Science Research Centers, Office of Science, U.S. Department of Energy
National Science Foundation
DMR-2011854
National Science Foundation
2016136

UChicago Information

Division(s)
Physical Sciences Division, Pritzker School of Molecular Engineering
Department(s)
Physics