报告题目：Emulating non-Hermitian quantum dynamics with neutral atoms

报告人：Gyu-Boong Jo    Department of Physics, HKUST

报告时间：2023年03月10日（周五）9:30

报告地点：理六栋302会议室         

邀请人：张善超

报告内容：

When a quantum system exchange energy or particles with the environment, its dynamics is profoundly altered and often described by the effective non-Hermitian Hamiltonian. Although such environments are ubiquitous in nature, it is still challenging to exploit non-Hermitian Hamitonian in genuine quantum systems. In this talk, we report on our recent realization of non-Hermitian atomic system with synthetic spin-orbit couplings in bulk and lattices. Non-Hermitian spin-orbit coupling for neutral atoms exhibits a parity-time symmetry-breaking transition across the singular point, so-called exceptional point. We will discuss how to obtain unprecedented chiral control of the quantum state around the exceptional point. In lattices, the realized exceptional point of the non-Hermitian band structure also exhibits the non-Hermitian skin effect, accumulation of particles around the edge of the system, which is accompanied by the generalization of guiding principles such as the Bloch band theory and the bulk-boundary correspondence. We will discuss our experimental observation of the skin effect.

专家简介：

Prof. Gyu-Boong Jo is currently Hari Harilela Associate Professor in the Department of Physics at The Hong Kong University of Science and Technology (HKUST), and leads the Laboratory for Ultracold Quantum Gases. He came to HKUST following his studies at the Massachusetts Institute of Technology (PhD 2010) where he was awarded the Samsung graduate fellowship and postdoctoral work at the University of California at Berkeley (2010-13). He obtained the Bachelor’s degree in Physics and Mathematics from the Seoul National University in 2003. He has received multiple awards including the AKPA Outstanding Young Researcher Award (OYRA) (2013), the Early Career Award from the Research Grant Council of Hong Kong (2014), the Croucher Innovation award (2016), the School of Science Research Award at HKUST (2019) and the UROP faculty award (2021).