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Generating multimode entangled microwaves with a superconducting parametric cavity

Chang, C.W. Sandbo; Simoen, M.; Aumentado, José; Sabín, Carlos; Forn-Díaz, P.; Vadiraj, A.M.; Quijandría, Fernando; Johansson, G.; Fuentes, I.; Wilson, C.M.

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Authors

C.W. Sandbo Chang

M. Simoen

José Aumentado

Carlos Sabín

P. Forn-Díaz

A.M. Vadiraj

Fernando Quijandría

G. Johansson

I. Fuentes

C.M. Wilson



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.

Journal Article Type Article
Acceptance Date Aug 22, 2018
Online Publication Date Oct 8, 2018
Publication Date Oct 8, 2018
Deposit Date Dec 6, 2018
Publicly Available Date Dec 6, 2018
Journal Physical Review Applied
Electronic ISSN 2331-7019
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 10
Issue 4
Article Number 044019
DOI https://doi.org/10.1103/PhysRevApplied.10.044019
Public URL https://nottingham-repository.worktribe.com/output/1371018
Publisher URL https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.10.044019

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