報告人：張曉斐 教授

報告題目：Characterizing Superfluid Fraction and Topological Property of Supersolids via Nonequilibrium Dynamics

報告時間：2026年1月17日（周六）下午14：30

報告地點：云龍校區智華樓205報告廳

主辦單位：數學與統計學院、數學研究院、科學技術研究院

報告人簡介：

張曉斐，現任陜西科技大學文理學院教授、博士生導師，西安交通大學兼職教授、中國科學院大學天文與空間科學學院崗位教授、陜西省特聘教授、陜西省青年科技新星，中科院青年創新促進會會員、西安分會會長，數理分會副秘書長，長期從事冷原子和精密測量物理領域研究。2010年博士畢業于中國科學院物理研究所，曾在中國科學院理論物理研究所、日本東京大學、日本國立電氣通信大學開展博士后研究工作。現為中國物理學會旗下《物理學報》《Chinese Physics B》《Chinese Physics Letters》《物理》青年編委，《Optik》編委，Cell (The innovation)組委會。在Physical Review Letters、Physical Review等發表100余篇，其中PhysRev.Lett./A/E 20余篇。

報告摘要：

Supersolids–exotic quantum states that combine superfluid flow with crystalline order–have recently been realized in quantum degenerate gases, yet a direct quantitative measurement of their superfluid fraction and understanding of their topological properties have remained elusive. We show that the nonequilibrium dynamics of a spin-orbit coupled dipolar Bose-Einstein condensate under PT-symmetric driving and dissipation generates an oscillating current whose frequency exhibits a strong dependence on the superfluid fraction of the underlying supersolid. This dynamical response further reveals topological phase transitions between distinct supersolid phases characterized by their spin textures. Our findings establish a platform for exploring supersolids with topological properties and provide deep insight into their nonequilibrium behavior beyond conventional closed-system scenarios.