报告题目/Title：Optical manipulation of the vortex states in ultracold quantum gases

报告时间/Time：2023年5月21日14:30 (14:30, May 21, 2023)

报告地点/Venue：物质科研楼A309会议室(Room A309, Material Science Building)

报告摘要/Abstract：Ultracold quantum gas has a high tunability which affords potential applications in quantum simulation and precision measurement. Different techniques have been explored to manipulate the quantum gases. In this talk, we will report how to create vortex states in ultracold atoms and manipulate them by using Laguerre-Gaussian (LG) laser beams. We experimentally observe the ground-state phase diagram of the spin-orbital-angular-momentum (SOAM) coupled Bose-Einstein condensate. The phase transitions are classified as the first order and the role of interatomic interaction on the phase transition is elucidated. We also show how to build up a vortex matter-wave interferometer with phase locking. Finally we will show how to controllably generate a macroscopic superposition of vortex states in quantum gases.

报告人简介/Biography：江开军，中科院精密测量科学与技术创新研究院研究员，博士生导师，原子分子光物理研究部主任。中科院武汉物理与数学研究所获得博士学位，先后在美国国家标准与技术研究院(NIST)和法国巴黎高等师范学院(ENS)从事博士后研究。中科院国际创新团队负责人，国家重点研发计划项目首席。从事超冷原子量子特性的研究，发展了拉盖尔-高斯光操控超冷原子量子态的方法，研究了超冷原子的自旋-角动量耦合、一阶量子相变、涡旋态干涉和涡旋态相干叠加等现象，在Nature, Physical Review Letters等物理期刊上发表SCI文章40余篇。