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Multipartite entanglement in a microwave frequency comb

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arxiv 2112.12105 v2 pith:L7YHCLX2 submitted 2021-12-22 quant-ph

Multipartite entanglement in a microwave frequency comb

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keywords entanglementmodesmultipartitecombfrequencymicrowaveamplifierbeen
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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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