Technical University of Munich

Abstract:

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.

Brief CV of Dr. Xin Zhang:

报告人张鑫，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。

报告地点：M楼249会议室

腾讯会议ID：236-630-662

会议密码：1212

邀请人：方辰    研究员

联系人：傅琦 （82649469）