Deterministic multi-phonon entanglement between two mechanical resonators on separate substrates
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 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>F</mml:mi> <mml:mo>=</mml:mo> <mml:mn>0.872</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.002</mml:mn></mml:math> , and a multi-phonon entangled N = 2 N00N state with a fidelity of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>F</mml:mi> <mml:mo>=</mml:mo> <mml:mn>0.748</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.008</mml:mn></mml:math> . The compact, modular, and scalable platform we demonstrate will enable further advances in the quantum control of complex mechanical systems.
Authors
- Xuntao Wu (ORCID: https://orcid.org/0009-0005-8064-9815)
- Rhys G. Povey (ORCID: https://orcid.org/0000-0002-3382-3287)
- Ming-Han Chou (ORCID: https://orcid.org/0000-0002-5646-4272)
- Christopher R. Conner (ORCID: https://orcid.org/0000-0002-6875-2298)
- Haoxiong Yan (ORCID: https://orcid.org/0000-0002-4797-9733)
- Hong Qiao (ORCID: https://orcid.org/0000-0002-3349-5754)
- Yash J. Joshi (ORCID: https://orcid.org/0000-0001-9930-014X)
- A. N. Cleland (ORCID: https://orcid.org/0000-0003-4981-4294)
- Joel Grebel (ORCID: https://orcid.org/0000-0002-5272-5260)
- Gustav Andersson (ORCID: https://orcid.org/0000-0003-1442-2573)
- Jacob M. Miller (ORCID: https://orcid.org/0000-0001-9956-994X)
Institutions
- Argonne National Laboratory (US)
- Google (United States) (US)
- University of Chicago (US)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-02-07
- DOI
- https://doi.org/10.1038/s41467-025-56454-0
- Citations
- 7
- Primary Topic
- Mechanical and Optical Resonators
- Type
- article
- Field-Weighted Citation Impact
- 8.73
Funders
- National Science Foundation
- U.S. Department of Energy
- University of Chicago
- Defense Advanced Research Projects Agency
- Office of Science
- Materials Research Science and Engineering Center, Harvard University
- Multidisciplinary University Research Initiative
- Division of Materials Research
- Division of Electrical, Communications and Cyber Systems
- Basic Energy Sciences
- Air Force Office of Scientific Research
- Army Research Office