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Entanglement distillation between solid-state quantum network nodes
N Kalb1,2, A A Reiserer1,2, P C Humphreys1,2
1QuTech, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
Science (New York, N.Y.)
|June 3, 2017
Summary
Researchers improved remote quantum entanglement using local operations on electron-nuclear qubits. This entanglement distillation enhances fidelity, crucial for advancing quantum networks and multiparticle entanglement exploration.
Area of Science:
- Quantum Information Science
- Quantum Networking
- Quantum Computing
Background:
- High-quality quantum entanglement is essential for future quantum networks.
- Imperfections in entanglement require methods to improve remote states via local operations.
Purpose of the Study:
- To demonstrate entanglement distillation on a quantum network primitive.
- To improve the fidelity of remote entangled states between distant nodes.
Main Methods:
- Utilized distant electron-nuclear two-qubit nodes.
- Employed single-photon-mediated entangling of electron spins.
- Implemented robust storage in nuclear spins.
- Applied local two-qubit gates and single-shot measurements.
Main Results:
- Successfully generated two copies of a remote entangled state.
- Achieved entanglement distillation, yielding a higher fidelity entangled state.
- Demonstrated a process for improving remote entanglement quality.
Conclusions:
- The combination of generating, storing, and processing entangled states is key.
- This technique enables the exploration of multiparticle entanglement on extended quantum networks.
- The study provides a vital primitive for building robust quantum networks.
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