Realization of a multinode quantum network of remote solid-state qubits
Matteo Pompili (Kavli institute of nanoscience Delft, TU Delft - QID/Hanson Lab, TU Delft - QuTech Advanced Research Centre)
S. L.N. Hermans (TU Delft - QID/Hanson Lab)
S. Baier (TU Delft - QID/Hanson Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
H.K.C. Beukers (TU Delft - QID/Hanson Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
Peter Humphreys (TU Delft - QID/Hanson Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
Raymond N. Schouten (TU Delft - QuTech Advanced Research Centre, TU Delft - ALG/General, Kavli institute of nanoscience Delft)
R. F.L. Vermeulen (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - ALG/General)
M. J. Tiggelman (Kavli institute of nanoscience Delft, TU Delft - BUS/Quantum Delft)
L. Dos Santos Martins (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QID/Hanson Lab)
B. Dirkse (Kavli institute of nanoscience Delft, TU Delft - QID/Wehner Group)
S.D.C. Wehner (TU Delft - Quantum Information and Software, TU Delft - Quantum Internet Division, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
R Hanson (Kavli institute of nanoscience Delft, TU Delft - QN/Hanson Lab, TU Delft - QID/Hanson Lab, TU Delft - QuTech Advanced Research Centre)
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Abstract
The distribution of entangled states across the nodes of a future quantum internet will unlock fundamentally new technologies. Here, we report on the realization of a three-node entanglement-based quantum network. We combine remote quantum nodes based on diamond communication qubits into a scalable phase-stabilized architecture, supplemented with a robust memory qubit and local quantum logic. In addition, we achieve real-time communication and feed-forward gate operations across the network. We demonstrate two quantum network protocols without postselection: the distribution of genuine multipartite entangled states across the three nodes and entanglement swapping through an intermediary node. Our work establishes a key platform for exploring, testing, and developing multinode quantum network protocols and a quantum network control stack.