学术报告第180期：Theory for self-bound states of dipolar Bose-Einstein condensates

主讲人 (Speaker): 

易俗

主讲人单位 (Speaker's Institute): 

中国科学院理论物理研究所

邀请人 (Invited by): 

李朝红

时间 (Time): 

星期四, 2020/09/24 - 10:30 to 11:30

地点 (Location): 

珠海校区天琴中心2316会议室

摘要 (Abstract): 

       We investigate the self-bound states of dipolar Dy condensates with the Gaussian-state ansatz which improves the conventional coherent-state ansatz with multimode squeezed coherent states. We show that the self-bound states consist of the experimentally observed self-bound liquid phase and the unobserved self-bound gas phase. The numerically obtained gas-liquid boundary is in good agreement with experimental data. Our theory also allows one to extract the real part of the three-body coupling constant of the Dy atoms from the particle number distribution of the condensates. In particular, we show that the self-bound states are stabilized by the short-range three-body repulsion. Our study sheds a different light to understand the self-bound droplets of Bose-Einstein condensates.

主讲人简介 (Speaker's CV): 

易俗，中国科学院理论物理研究所研究员。1993年获中国科学技术大学学士学位。1996年获中国科学技术大学硕士学位，2002年获得美国Georgia Insitiute of Technology 博士学位。2002年10月至2006年1月期间先后在美国Georgia Insitiute of Technology和Rice University从事博士后研究。2005年10月入选中科院“百人计划”。2010年获得国家“杰出青年基金”资助。主要从事与超冷原子物理相关的理论研究。