报告题目：Waveguide Quantum Electrodynamics: manipulating the interaction of photons and atoms

报告时间：2024年12月12日（周四）15:30

报告地点：鼓楼校区唐仲英楼 B501

报  告 人：吕新友，华中科技大学

摘      要：

In this presentation, I will firstly introduce the background of waveguide quantum electrodynamics (QED) and its applications. Secondly, I will introduce the analytical expression of the nth-order equal-time correlation functions. Based on the analytic solution, I mainly introduce the perfect photon blockade (PB) effect induced by the chiral interaction in waveguide-cavity QED system. Specifically, the destructive interference of two-photon paths only appears in the chiral region. We find that the perfect PB points rise as the number of cavities increases, and the required chirality also decreases exponentially. Lastly, I will introduce our recent work regarding the exotic long-range interaction and the associating quantum many-body phases in topological waveguide QED system. We theoretically predict a kind of power-law-exponential (PLE) dipole-dipole interaction between quantum emitters. Applying PLE interaction to a spin model, we find that PLE interaction can induce the unique ordered and critical spiral phases in comparison with other types of interaction, owing to the strong frustration of PLE interaction. Our works is of fundamental interest in enriching the waveguide QED system by introducing the chiral and the exotic long-range interaction, and has potential applications in the on-chip single-photon source with integrability and quantum simulation of strong correlated matters.

报告人简介：

吕新友，华中科技大学物理学院教授，博士生导师，国家自然科学基金“杰出青年基金”、“优秀青年基金”和湖北省“百人计划”获得者。主要从事腔量子电动力学（QED）和腔光力学等方面的理论研究。

      联系人：马小松，Xiaosong.Ma@nju.edu.cn