报告题目：Unraveling Superradiance——Semiclassical Nature and Spontaneous Spin Ordering

报 告 人：张鑫，慕尼黑工业大学

报告时间：2025年12月16日15:00

报告地点：物理楼W260

内容摘要：Superradiance stands as a hallmark phenomenon in collective quantum optics. I will show the unraveling of superradiant dynamics into individual quantum trajectories via homodyne detection. Remarkably, despite the presence of entanglement, these trajectories can be effectively treated as product states for describing local observables. This finding drastically simplies the complexity of superradiant phenomona and can lead to fully classcial and exact description in some scenerios, offering both analytical treatment and intuitive understanding. Furthermore, I will show that our approach extends to regimes dominated by subradiant decay. Finally, I will present a novel emergent collective behavior in waveguide QED uncovered by this trajectory-based perspective, which renders superradiance robust to strong disorders.

Ref: Xin H. H. Zhang, Daniel Malz, Peter Rabl, Phys. Rev. Lett. 135, 033602 (2025); Xin H. H. Zhang, Daniel Malz, Peter Rabl, arXiv: 2510.13671.

报告人简介:张鑫，现为慕尼黑工业大学博士后，本科毕业于山东大学，博士毕业于杜克大学，主要研究量子光学、开放量子系统与量子多体理论。