Multipartite entanglement in a microwave frequency comb

Significant progress has been made with multipartite entanglement of discrete qubits, but continuous variable systems may provide a more scalable path toward entanglement of large ensembles. We demonstrate multipartite entanglement in a microwave frequency comb generated by a Josephson parametric am...

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Veröffentlicht in:	arXiv.org 2023
Hauptverfasser:	Jolin, Shan W, Andersson, Gustav, Rivera Hernández, J C, Strandberg, Ingrid, Quijandría, Fernando, Aumentado, Joe, Borgani, Riccardo, Tholén, Mats O, Haviland, David B
Format:	Text Resource
Sprache:	eng
Schlagworte:	bichromatic pump Continuity (mathematics) Digital signal processing Entanglement frequency comb Gaussian states Josephson junctions microwave Microwave frequencies multipartite entanglement Parametric amplifiers Physics - Quantum Physics Transmission lines
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Beschreibung
Zusammenfassung:	Significant progress has been made with multipartite entanglement of discrete qubits, but continuous variable systems may provide a more scalable path toward entanglement of large ensembles. We demonstrate multipartite entanglement in a microwave frequency comb generated by a Josephson parametric amplifier subject to a bichromatic pump. We find 64 correlated modes in the transmission line using a multifrequency digital signal processing platform. Full inseparability is verified in a subset of seven modes. Our method can be expanded to generate even more entangled modes in the near future.
ISSN:	2331-8422
DOI:	10.48550/arxiv.2112.12105