Photonic-reconfigurable entanglement distribution network based on silicon quantum photonics  

作　　者：DONGNING LIU JINGYUAN LIU XIAOSONG REN XUE FENG FANG LIU KAIYU CUI YIDONG HUANG WEI ZHANG 

机构地区：[1]Frontier Science Center for Quantum Information,Beijing National Research Center for Information Science and Technology(BNRist),Electronic Engineering Department,Tsinghua University,Beijing 100084,China [2]Beijing Academy of Quantum Information Sciences,Beijing 100193,China

出　　处：《Photonics Research》2023年第7期1314-1325,共12页光子学研究（英文版）

基　　金：National Key Research and Development Program of China (2018YFB2200400);Beijing Municipal Natural Science Foundation (Z180012);National Natural Science Foundation of China (61875101,91750206);Tsinghua Initiative Scientific Research Program。

摘　　要：The entanglement distribution network connects remote users by sharing entanglement resources,which is essential for realizing quantum internet.We propose a photonic-reconfigurable entanglement distribution network(PR-EDN)based on a silicon quantum photonic chip.The entanglement resources are generated by a quantum light source array based on spontaneous four-wave mixing in silicon waveguides and distributed to different users through time-reversed Hong–Ou–Mandel interference by on-chip Mach–Zehnder interferometers with thermo-optic phase shifters(TOPSs).A chip sample is designed and fabricated,supporting a PR-EDN with3 subnets and 24 users.The network topology of the PR-EDN could be reconfigured in three network states by controlling the quantum interference through the TOPSs,which is demonstrated experimentally.Furthermore,a reconfigurable entanglement-based quantum key distribution network is realized as an application of the PR-EDN.The reconfigurable network topology makes the PR-EDN suitable for future quantum networks requiring complicated network control and management.Moreover,it is also shown that silicon quantum photonic chips have great potential for large-scale PR-EDN,thanks to their capacities for generating and manipulating plenty of entanglement resources.

关 键 词：QUANTUM distribution topology 

分 类 号：O431.2[机械工程—光学工程]