题目： A Quantum Many-Body Waltz on the Poincaré Disk:Bose-Einstein Condensates with random interaction strength

报告人：刘明扬 博士（香港大学）

时 间：2026年07月23日（星期四）上午10:30-11:30

地 点：四川大学望江校区西五教学楼319会议室

报告摘要：In this talk, we investigate the dynamics of a uniform Bose-Einstein condensate with random interaction strength. We show that the system's dynamics can be mapped onto a stochastic flow on the upper sheet of the two-sheet hyperboloid, or equivalently, the Poincaré disk. On this manifold, the system admits a purely classical description in terms of the Poisson bracket defined on it. Under the weak-noise assumption, we derive analytic expressions for physical observables—such as the particle number—that agree well with numerical simulations.

报告人简介：Dr. Mingyang Liu works on ultra-cold atomic gases. He received his Bachler’s degree from Wuhan University in 2019, PhD degree from University of Hong Kong in 2023. Now, he is a postdoc researcher in University of Hong Kong. He did some work on p-wave Bose-Einstein condensate and three-body problem for fermions in 1D. Now his interest focuses on stochastic process in quantum many-body physics.