Spectrally uniform continuous-variable quantum microcombs

Release Time:2026-06-17  Hits:

• Date:2026-06-17
• DOI Number:10.1103/vjtv-2prg
• Title of Paper:Spectrally uniform continuous-variable quantum microcombs
• Journal:Phys. Rev. Lett.
• Summary:Continuous-variable (CV) quantum microcombs generated in high-Q microresonators provide compact, frequency-multiplexed sources of entangled modes for integrated quantum information processing. Although deterministic Kerr-induced two-mode squeezing has been demonstrated on chip, achieving uniform squeezing across a large number of mode pairs remains a central challenge. Here we establish the conditions required for spectrally uniform squeezing and experimentally realize a vacuum-state CV quantum microcomb by combining a microresonator with an engineered single-family mode structure and optimized pump conditions. The device generates 14 independent two-mode squeezed states over a 0.7~THz bandwidth, each exhibiting more than 4 dB of raw squeezing, with a maximum of 4.3 dB. This uniform, high-performance quantum resource represents a key step toward scalable, integrated CV quantum technologies operating beyond classical limits.
• First Author:Kangkang Li,Yue Wang,Ze Wang,Xin Zhou,Jincheng Li,Yinke Cheng,Binyan Wu,Qihuang Gong
• Correspondence Author:Bei-Bei Li,Qi-Fan Yang
• Volume:137
• Issue:2
• Page Number:023802
• Translation or Not:No
• Date of Publication:2026-06-03