报告题目：Quantum Interface between Light and Cold Atomic Ensembles

报告人：王兴昌 博士（南方科技大学）

报告时间：2025年4月30日（周三）上午10:00

报告地点：光电所二层报告厅

报告摘要：  

Laser-cooled and trapped cold atomic ensembles can be efficiently interfaced with quantum optical fields, providing a favorable route for the engineering of quantum states in both atoms and photons. Using an optically thick cold atomic ensemble, we demonstrated a quantum inference between single stored atomic coherence and photons. By adjusting the Hermiticity of this beam splitter interface through light field frequency tuning, we observed fermion-like anti-coalescence between these bosonic modes. In another work, we transferred the spatial degree of freedom into the temporal domain of a single photon in such cold atomic ensembles by utilizing the electromagnetically induce transparency (EIT) effect. Combined with spatial single-photon shaping, we achieved spatiotemporal control of a propagation invariant 2+1D Airy single-photon optical bullet. Furthermore, the long coherent time of stored atomic collective excitation in cold atomic ensembles can be applied in metrological applications.

报告人简介：

王兴昌，2023年博士毕业于南方科技大学，目前在深圳量子科学与工程研究院从事博士后研究，并获得了南方科技大学校长卓越博士后项目资助。研究兴趣集中于基于冷原子系综的量子态操控，已经在包括Physical Review Letters等杂志发表了多篇研究工作。