Multipartite entanglement in a microwave frequency comb
Shan W. Jolin, Gustav Andersson, J. C. Rivera Hern\'andez, Ingrid, Strandberg, Fernando Quijandr\'ia, Joe Aumentado, Riccardo Borgani, Mats O., Thol\'en, David B. Haviland
TL;DR
This paper demonstrates multipartite entanglement across 64 microwave modes generated by a Josephson parametric amplifier, verifying full inseparability in a subset, advancing scalable quantum entanglement in continuous variable systems.
Contribution
It introduces a method to generate and verify multipartite entanglement in a microwave frequency comb with a large number of modes, showing scalability potential.
Findings
64 correlated microwave modes identified
Full inseparability verified in seven modes
Method scalable for more entangled modes
Abstract
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.
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Taxonomy
TopicsQuantum Information and Cryptography · Mechanical and Optical Resonators · Photonic and Optical Devices