Generating Multimode Entangled Microwaves with a Superconducting Parametric Cavity
Generating Multimode Entangled Microwaves with a Superconducting Parametric Cavity
We demonstrate the generation of multimode entangled states of propagating microwaves. The entangled states are generated by our parametrically pumping a multimode superconducting cavity. By combining different pump frequencies, applied simultaneously to the device, we can produce different entanglement structures in a programable fashion. The Gaussian output states are fully characterized by our measuring the full covariance matrices of the modes. The covariance matrices are absolutely calibrated by our using an in situ microwave calibration source, a shot-noise tunnel junction. Applying a variety of entanglement measures, we demonstrate both full inseparability and genuine tripartite entanglement of the states. Our method is easily extensible to more modes.
Sandbo Chang, C. W.
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Simoen, M.
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Aumentado, José
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Sabín, Carlos
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Forn-Díaz, P.
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Vadiraj, A. M.
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Quijandría, Fernando
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Johansson, G.
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Fuentes, I.
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Wilson, C. M.
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8 October 2018
Sandbo Chang, C. W.
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Simoen, M.
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Aumentado, José
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Sabín, Carlos
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Forn-Díaz, P.
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Vadiraj, A. M.
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Quijandría, Fernando
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Johansson, G.
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Fuentes, I.
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Wilson, C. M.
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Sandbo Chang, C. W., Simoen, M., Aumentado, José, Fuentes, I. and Wilson, C. M.
,
et al.
(2018)
Generating Multimode Entangled Microwaves with a Superconducting Parametric Cavity.
Physical Review Applied, 10 (4), [044019].
(doi:10.1103/PhysRevApplied.10.044019).
Abstract
We demonstrate the generation of multimode entangled states of propagating microwaves. The entangled states are generated by our parametrically pumping a multimode superconducting cavity. By combining different pump frequencies, applied simultaneously to the device, we can produce different entanglement structures in a programable fashion. The Gaussian output states are fully characterized by our measuring the full covariance matrices of the modes. The covariance matrices are absolutely calibrated by our using an in situ microwave calibration source, a shot-noise tunnel junction. Applying a variety of entanglement measures, we demonstrate both full inseparability and genuine tripartite entanglement of the states. Our method is easily extensible to more modes.
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Published date: 8 October 2018
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© 2018 American Physical Society.
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Local EPrints ID: 476671
URI: http://eprints.soton.ac.uk/id/eprint/476671
ISSN: 2331-7019
PURE UUID: f27ffdd4-1c2b-43e3-b21a-c7b8bd82e519
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Date deposited: 11 May 2023 16:30
Last modified: 05 Jun 2024 19:48
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Contributors
Author:
C. W. Sandbo Chang
Author:
M. Simoen
Author:
José Aumentado
Author:
Carlos Sabín
Author:
P. Forn-Díaz
Author:
A. M. Vadiraj
Author:
Fernando Quijandría
Author:
G. Johansson
Author:
C. M. Wilson
Corporate Author: et al.
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