Abstract: I will discuss the concept of quantum many-body light, in which many emitters interact coherently and emit collectively. A prototype is proposed to achieve a squeezed quantum light with high brightness. We recently realized superradiant diamond maser under ambient conditions, which can be a potential platform for achieving quantum many-body light.

References:
1. Xiao, D.W., Chen, C. and Liu, R.B., 2026. Squeezed superradiant lasing of a quantum many-body emitter. arXiv: 2602.16215 (2026).
2. Wu, W.J., Xiao, D.W., Wang, W.T., Chen, X.Y., Wang, X.F., Ai, M.Z., Li, Q. and Liu, R.B., 2026. Sustained macroscopic quantum coherence in a superradiant solid under ambient conditions. arXiv:2608.23748 (2026).

About the speaker: Ren-Bao Liu is the Choh-Ming Li Professor of Physics at The Chinese University of Hong Kong (CUHK) and Director of the State Key Laboratory of Quantum Information Technologies and Materials. He received his B.Sc. from Nanjing University in 1995 and his Ph.D. from the Institute of Semiconductors, Chinese Academy of Sciences, in 2000. After postdoctoral research at Tsinghua University and UC San Diego, he joined CUHK in 2005 and became a full professor in 2014. His research spans quantum coherence, quantum sensing, quantum computing, and quantum optics. He is a New Cornerstone Investigator (2023), a Fellow of the American Physical Society (2025), Optica (2022), and the Institute of Physics UK (2021), and a recipient of the Willis E. Lamb Award for Laser Science and Quantum Optics (2022) and the Huang Kun Prize in Solid State Physics and Semiconductor Physics (2013).

Inviter: 刘刚钦 (82649801, gqliu@iphy.ac.cn)