发表机构
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University; Collaborative Innovation Center of Extreme Optics, Shanxi University（山西大学光电研究所量子光学与量子光学器件国家重点实验室; 山西大学极端光学协同创新中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究在实验中演示了可保留光螺旋性的手性F-P腔中原子-光子行波相互作用，为相关量子光学研究提供了新途径。
AI 中文摘要
F-P腔对原子-光子相互作用的增强为研究量子光学和原子物理提供了合适平台。但线性F-P腔中的发射场为驻波模式，会导致原子-光子耦合不均匀，且腔增强自旋波量子存储的存储寿命较短。本研究实验演示了可保留光螺旋性的F-P腔中原子-光行波相互作用：首先沿z轴施加偏置磁场以定义量子化轴，解除塞曼简并并破坏时间反演对称性；随后基于Duan-Lukin-Cirac-Zoller方案产生斯托克斯光子与自旋波的非经典关联对，从单个圆偏振原子跃迁初始发射的斯托克斯光子，沿+z（正向）和-z（反向）方向传播时分别具有左旋和右旋圆偏振，且在手性腔内的原子-光子相互作用区域得以保留；因此，当正向和反向斯托克斯场与腔共振时，它们可与原子以行波方式相互作用，这一点通过测量与正向、反向斯托克斯场关联的自旋波的时间相关 retrieval效率得到证实。本工作为演示F-P腔中的原子-光子行波相互作用铺平了道路。
英文摘要
The enhancement of atom-photon interactions with F-P cavities provides a suitable platform for studying quantum optics and atomic physics. However, the emission fields in linear F-P cavities are in the standing-wave mode, which leads to non-uniform atom-photon coupling and a short storage lifetime of cavity-enhanced spin-wave quantum storages. This study experimentally demonstrates traveling-wave atom-light interactions in an F-P cavity that can preserve light helicity. First, a bias magnetic field is applied along the z-axis to define the quantization axis, which lifts the Zeeman degeneracy and breaks the time reversal symmetry. Next, non-classically correlated pairs of Stokes photons and spin waves are produced based on the Duan-Lukin-Cirac-Zoller scheme. The Stokes photons initially emitted from a single circularly polarized atomic transition have left-and right-hand circular polarizations when propagating along the +z (forward) and -z (backward) directions, which are preserved in the chiral cavity within the atom-photon interaction region. Thus, when the forward and backward Stokes fields resonate with the cavity, they may interact with the atoms in a traveling-wave manner. This is confirmed by measuring the time-dependent retrieval efficiencies of spin waves correlated with the forward and backward Stokes fields. This work paves the way for demonstrating traveling-wave atom-photon interactions in F-P cavities.
Comments19 pages,2 figures
