报告题目：Quantum gas microscopy of a geometrically frustrated Hubbard system

报 告 人：杨晋（博士后），麻省理工学院

邀 请 人：张进

时    间：2023年5月29号（星期一）上午10:00

地    点：腾讯会议（950-472-222）

Abstract: Quantum gas microscopes take quantum simulation with neutral atoms in optical lattices into a new era. The site-resolved-imaging enables direct measurements of correlation functions, topological and exotic quantum phases, many-body entanglements, and dynamic processes like spin and charge transport. We extended this system from square optical lattices to triangular optical lattices, where geometric frustration plays a significant role. Many intriguing properties are expected to exist in triangular lattices, like spin liquids, kinetic frustration, and novel spin-hole binding mechanisms. And these properties are believed to be related to novel high temperature superconductivity. Here I present our work on site-resolved measurements of spin-correlation-functions in triangular lattices at the University of Virginia. We found that geometric frustration leads to reduced but non-vanishing spin-correlations in triangular lattices. The measurement of spin-correlations is relevant to the search for spin liquid states in the triangular Hubbard model. Our work and result will be stimuli for more interest and research on triangular lattices in the future.

Brief CV: 杨晋，2012 年 8 月至 2019 年 8 月在美国俄克拉荷马大学 James Shaffer 组从事超长程里德堡分子研究，并获得博士学位，相关工作发表在 Science， PRL 期刊。2019 年 9 月至 2022 年 6 月在弗吉尼亚大学从事超冷原子量子模拟的研究，与 Peter Schauss 教授搭建了世界第一台三角形二维光学晶格单原子单晶格光学成像系统，相关工作发表在 PRX-Quantum，Physical Review 系列期刊。现为麻省理工学院博士后，合作导师为诺贝尔奖获得者，美国科学院院士 Wolfgang Ketterle 教授，研究方向为超冷 dysprosium 长程偶极作用。