报告题目：Nonlinear Quantum Optical Effects Induced by Counter-Rotating Waves and Their Applications

报告人：陈叶鸿 教授 （福州大学）

报告时间：2026年10月16日（周五） 15：30-16：30

报告地点：北洋园校区32教140室

报告摘要：

In quantum optics, high-order virtual excitations induced by counter-rotating terms endow light-matter interactions with rich nonlinearity. Focusing on high-order quantum resonances, we investigate their mechanisms, robust control, and applications. Using three-photon resonance and Casimir-Rabi oscillations as examples, we analyze how high-order virtual transitions form resonant coupling via effective Hamiltonians, and validate the conditions with full-model numerical dynamics. To overcome the extreme sensitivity to frequency errors, we propose optimized multi-frequency pulse sequences, significantly broadening the high-fidelity operating region. We show that under proper frequency matching, even in the weak-coupling regime, counter-rotating terms can produce pronounced high-order resonant dynamics. As the order increases, effective coupling weakens and the resonance window narrows, making precise matching and robust control essential, while this sensitivity also provides a resource for quantum precision measurement. For applications, we construct Raman transitions using dressed states and two-frequency driving to convert virtual photons into real photons, and study photon-pair bunching in the dynamical Casimir process. We also apply high-order resonances to frequency and coupling-strength estimation in the quantum Rabi model, driven Kerr resonator, and LMG model, finding enhanced sensitivity. Our research provides theoretical foundations and feasible pathways for practical quantum sensing beyond the standard quantum limit and for robust quantum control.

报告人简介：

陈叶鸿，福州大学物理与信息工程学院教授，博士生导师，入选国家级引进人才专项计划，福建省引才百人计划，福建省闽江学者奖励计划和日本JSPS fellowship。2018年6月博士毕业于福州大学，随后在日本理化学研究所Franco Nori组从事博士后研究，2023年回福州大学工作至今。主要研究领域为量子光学、量子计算和量子模拟。以第一/通讯作者在Physical Review Letters等刊物上发表文章50余篇（包括5篇ESI高被引论文），文章被引用近3000次，h-index：30。主持国家自然科学基金项目2项，参与多项。