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Abstract:
Quantum correlations in observables of multiple systems not only are of fundamental interest, but also play a key role in quantum information processing. As a signature of these correlations, the violation of Bell inequalities has not been demonstrated with multipartite hybrid entanglement involving both continuous and discrete variables. Here we create a five-partite entangled state with three superconducting transmon qubits and two photonic qubits, each encoded in the mesoscopic field of a microwave cavity. We reveal the quantum correlations among these distinct elements by joint Wigner tomography of the two cavity fields conditional on the detection of the qubits and by test of a five-partite Bell inequality. The measured Bell signal is 8.381 +/- 0.038, surpassing the bound of 8 for a four-partite entanglement imposed by quantum correlations by 10 standard deviations, demonstrating the genuine five-partite entanglement in a hybrid quantum system.
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PHYSICAL REVIEW LETTERS
ISSN: 0031-9007
Year: 2020
Issue: 18
Volume: 125
9 . 1 6 1
JCR@2020
8 . 1 0 0
JCR@2023
ESI Discipline: PHYSICS;
ESI HC Threshold:115
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 20
SCOPUS Cited Count: 20
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: