Print Email Facebook Twitter Qubit teleportation between non-neighbouring nodes in a quantum network Title Qubit teleportation between non-neighbouring nodes in a quantum network Author Hermans, S.L.N. (TU Delft QID/Hanson Lab) Pompili, M. (TU Delft QID/Hanson Lab; Kavli institute of nanoscience Delft) Beukers, H.K.C. (TU Delft QID/Hanson Lab; Kavli institute of nanoscience Delft) Baier, S. (TU Delft QID/Hanson Lab; Kavli institute of nanoscience Delft) Borregaard, J. (TU Delft QN/Borregaard groep; Kavli institute of nanoscience Delft) Hanson, R. (TU Delft QID/Hanson Lab; Kavli institute of nanoscience Delft) Date 2022 Abstract Future quantum internet applications will derive their power from the ability to share quantum information across the network1,2. Quantum teleportation allows for the reliable transfer of quantum information between distant nodes, even in the presence of highly lossy network connections3. Although many experimental demonstrations have been performed on different quantum network platforms4–10, moving beyond directly connected nodes has, so far, been hindered by the demanding requirements on the pre-shared remote entanglement, joint qubit readout and coherence times. Here we realize quantum teleportation between remote, non-neighbouring nodes in a quantum network. The network uses three optically connected nodes based on solid-state spin qubits. The teleporter is prepared by establishing remote entanglement on the two links, followed by entanglement swapping on the middle node and storage in a memory qubit. We demonstrate that, once successful preparation of the teleporter is heralded, arbitrary qubit states can be teleported with fidelity above the classical bound, even with unit efficiency. These results are enabled by key innovations in the qubit readout procedure, active memory qubit protection during entanglement generation and tailored heralding that reduces remote entanglement infidelities. Our work demonstrates a prime building block for future quantum networks and opens the door to exploring teleportation-based multi-node protocols and applications2,11–13. To reference this document use: http://resolver.tudelft.nl/uuid:55186b2a-d6de-40de-ae8f-de5a24d59b9d DOI https://doi.org/10.1038/s41586-022-04697-y ISSN 0028-0836 Source Nature: international weekly journal of science, 605 (7911), 663-668 Part of collection Institutional Repository Document type journal article Rights © 2022 S.L.N. Hermans, M. Pompili, H.K.C. Beukers, S. Baier, J. Borregaard, R. Hanson Files PDF s41586_022_04697_y.pdf 4.16 MB Close viewer /islandora/object/uuid:55186b2a-d6de-40de-ae8f-de5a24d59b9d/datastream/OBJ/view