Tsinghua University researchers propose novel method in reconfigurable quantum entanglement distribution networks
 
Recently, Professor Wei Zhang from @Tsinghua_Uni Department of Electronic Engineering proposed a reconfigurable #quantum #entanglement distribution network based on a silicon photonic integrated four-wave mixing quantum light source. By introducing a pump management mechanism, the number of wavelength channels required for an N-user network is reduced to O(N) (compared to O(N²) in traditional WDM-based quantum entanglement distribution networks). This network also possesses strong capabilities on network reconfiguration while ensuring that each pair of user lines independently and utilizes a single entanglement resource. These features make this network architecture advantageous in terms of scalability, reconfigurability, and high performance.

On December 13, 2024, this work was published online in @ScienceMagazine Advances under the title "Reconfigurable Entanglement Distribution Network Based on Pump Management of Spontaneous Four-Wave Mixing Source." Miss Jingyuan Liu, a PhD candidate from the Department of Electronic Engineering, Tsinghua University, is the first author of the paper. Prof. Wei Zhang and Prof. Yidong Huang are the corresponding authors. This research used single photon detectors developed by Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences (SIMIT, CAS). It was supported by the Beijing Academy of Quantum Information Sciences, the National Natural Science Foundation of China, and National Key Research and Development Program of China.
#quantum #entanglement