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High-Rate Cross-Channel Entanglement Swapping Between Independent On-Chip Sources.

Haoyang Wang1,2,3, Huihong Yuan1, Qiang Zeng1

  • 1Beijing Academy of Quantum Information Sciences, Beijing, 100193, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 5, 2025
PubMed
Summary
This summary is machine-generated.

Researchers demonstrated high-rate cross-channel entanglement swapping using silicon chips, achieving a record 207 counts per hour. This breakthrough advances quantum networks by enabling flexible user pairing and efficient quantum communication.

Keywords:
cross‐channelentanglement swappingintegrated quantum chipsilicon on insulatetime‐bin

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Area of Science:

  • Quantum photonics
  • Quantum communication
  • Integrated optics

Background:

  • Quantum networks require robust methods for interconnecting quantum sources.
  • Entanglement swapping is crucial for extending quantum correlations over distances.
  • Chip-based quantum photonics offers a scalable platform for quantum network components.

Purpose of the Study:

  • To demonstrate high-rate, cross-channel entanglement swapping on a silicon photonic chip.
  • To achieve dynamic channel switching for flexible user pairing in quantum networks.
  • To establish a benchmark for chip-based entanglement swapping performance.

Main Methods:

  • Utilized low-loss silicon chips with integrated waveguide structures.
  • Employed frequency-offset pumps to enable cross-channel entanglement swapping.
  • Measured swapping visibilities and rates to evaluate performance.

Main Results:

  • Achieved a record-high entanglement swapping rate of 207 counts per hour.
  • Demonstrated high swapping visibilities exceeding 90% between channel pairs.
  • Showcased dynamic channel switching capability by adjusting pump wavelengths.

Conclusions:

  • The demonstrated cross-channel entanglement swapping provides a viable solution for quantum networks.
  • This work sets a new benchmark for chip-based entanglement swapping.
  • The flexible architecture supports scalable and efficient quantum communication.