High‐Rate Cross‐Channel Entanglement Swapping Between Independent On‐Chip Sources

The emerging integrated quantum photonics is pushing forward the establishment of quantum networks. To interconnect individual chip‐based quantum sources, high‐performance entanglement swapping is indispensable. Here, using low‐loss silicon chips with waveguide structure and frequency‐offset pumps, high‐rate cross‐channel entanglement swapping is demonstrated. A record‐high swapping rate of 207 counts per hour is obtained, and the measured swapping visibilities between each of two pairs of channels exceed 90%. The proposed cross‐channel architecture allows dynamic channel switching by adjusting pump wavelengths, enabling flexible user pairing in quantum networks. This work makes a concrete benchmark for chip‐based entanglement swapping and provides a viable solution for real‐world quantum communication.