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Qubit teleportation between non-neighbouring nodes in a quantum network
S L N Hermans1, M Pompili1, H K C Beukers1
1QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands.
Nature
|May 25, 2022
Summary
Researchers achieved quantum teleportation between non-neighboring nodes in a quantum network. This breakthrough enables reliable quantum information transfer for future quantum internet applications.
Area of Science:
- Quantum Information Science
- Quantum Networking
Background:
- Quantum teleportation is key for quantum internet, enabling reliable quantum information transfer over lossy networks.
- Previous demonstrations were limited to directly connected nodes due to stringent requirements on entanglement and qubit coherence.
Purpose of the Study:
- To demonstrate quantum teleportation between remote, non-neighboring nodes in a multi-node quantum network.
- To overcome limitations hindering the scalability of quantum network demonstrations.
Main Methods:
- Utilized a three-node quantum network with optically connected solid-state spin qubits.
- Implemented remote entanglement generation, entanglement swapping on a central node, and qubit storage in memory.
- Developed innovative qubit readout procedures and active memory protection during entanglement generation.
Main Results:
- Successfully performed quantum teleportation between non-neighboring nodes.
- Achieved teleportation fidelity above the classical bound with heralded success.
- Demonstrated efficient teleportation even with unit efficiency.
Conclusions:
- This work presents a crucial building block for scalable quantum networks.
- The demonstrated capabilities pave the way for multi-node teleportation protocols and quantum internet applications.
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