報(bào)告人：張曉斐 教授

報(bào)告題目：Characterizing Superfluid Fraction and Topological Property of Supersolids via Nonequilibrium Dynamics

報(bào)告時(shí)間：2026年1月17日（周六）下午14：30

報(bào)告地點(diǎn)：云龍校區(qū)智華樓205報(bào)告廳

主辦單位：數(shù)學(xué)與統(tǒng)計(jì)學(xué)院、數(shù)學(xué)研究院、科學(xué)技術(shù)研究院

報(bào)告人簡(jiǎn)介：

張曉斐，現(xiàn)任陜西科技大學(xué)文理學(xué)院教授、博士生導(dǎo)師，西安交通大學(xué)兼職教授、中國(guó)科學(xué)院大學(xué)天文與空間科學(xué)學(xué)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(chuàng)新促進(jìn)會(huì)會(huì)員、西安分會(huì)會(huì)長(zhǎng)，數(shù)理分會(huì)副秘書(shū)長(zhǎng)，長(zhǎng)期從事冷原子和精密測(cè)量物理領(lǐng)域研究。2010年博士畢業(yè)于中國(guó)科學(xué)院物理研究所，曾在中國(guó)科學(xué)院理論物理研究所、日本東京大學(xué)、日本國(guó)立電氣通信大學(xué)開(kāi)展博士后研究工作。現(xiàn)為中國(guó)物理學(xué)會(huì)旗下《物理學(xué)報(bào)》《Chinese Physics B》《Chinese Physics Letters》《物理》青年編委，《Optik》編委，Cell (The innovation)組委會(huì)。在Physical Review Letters、Physical Review等發(fā)表100余篇，其中PhysRev.Lett./A/E 20余篇。

報(bào)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.