Bright 547-dimensional Hilbert-space entangled resource in 28-pair modes biphoton frequency comb from a reconfigurable silicon microring resonator

• 作者: Qilin Zheng Jiacheng Liu Chao Wu Shichuan Xue Pingyu Zhu Yang Wang Xinyao Yu Miaomiao Yu Mingtang Deng Junjie Wu Ping Xu
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: RAPID COMMUNICATION
• 页码范围: 142-148
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/ac3507

摘要

High-dimensional entanglement provides valuable resources for quantum technologies,including quantum commu-nication,quantum optical coherence tomography,and quantum computing.Obtaining a high brightness and dimensional entanglement source has significant value.Here we utilize a tunable asymmetric Mach-Zehnder interferometer coupled silicon microring resonator with 100 GHz free spectral range to achieve this goal.With the strategy of the tunable cou-pler,the dynamical and extensive tuning range of quality factors of the microring can be obtained,and then the biphoton pair generation rate can be optimized.By selecting and characterizing 28 pairs from a more than 30-pair modes biphoton frequency comb,we obtain a Schmidt number of at least 23.4 and on-chip pair generation rate of 19.9 MHz/mW2 under a low on-chip pump power,which corresponds to 547 dimensions Hilbert space in frequency freedom.These results will prompt the wide applications of quantum frequency comb and boost the further large density and scalable on-chip quantum information processing.