6163银河线路检测中心学术论坛（第七十四讲）

阿秒量子光学与扭曲超辐射

Attosecond Quantum Optics and Tortured Super-Radiance

报告摘要： 

The last few years have seen a revolution in our understanding of attosecond nonlinear optics such as high harmonic generation: we have started to appreciate that highly non-equilibrium quantum dynamics of matter can endow its nonlinear optical response with distinct quantum properties. I will present some of our latest results describing how quantum dynamics of even simple material systems, from a two-level system to an atom to a small molecule, can be tailored to generate quantum states of light. In small molecules, the interplay of ultrafast electronic excitation and nuclear dynamics can be used to make and break a Schrödinger cat. 

Turning to atomic gases, one can take advantage of the strong classical driving field to generate multiple excitations, setting up conditions for Dicke super-radiance. What would happen if these atoms are placed inside a cavity which is far detuned from the atomic line? The atoms are now strongly discouraged from emitting the frequencies they normally do, while being constantly excited by a strong classical field. We find that when placed inside such a torture chamber, the atoms form strongly correlated many-body state that tunes its energy to the cavity resonance. The released super-radiance then develops distinctly quantum properties leading to the generation of a multi-mode squeezed state. Time resolving the generated emission clearly shows how the atomic ensemble undergoes a phase transition from many uncorrelated, even if phase-locked, excitations to a correlated many-body state. 

报告人简介：

Mikhail Ivanov教授， 欧洲科学院院士，于1989年在Prokhorov General Physics Institute获得博士学位，曾在俄罗斯、波兰、加拿大、英国、以色列、德国等国家的知名研究机构和大学从事科研与教学工作。Ivanov教授是超快强场物理与阿秒物理领域的国际领军学者，2012年起任马克思·玻恩非线性光学研究所研究员和柏林洪堡大学物理系W3教授，2016年起他创建并领导着马克思·玻恩非线性光学研究所的理论部，2022年起兼任以色列理工学院客座教授。他在物理学领域的杰出贡献获得了多个权威奖项的认可，包括2003年由加拿大皇家学会颁发的Rutherford Medal in Physics和2004年由亚历山大·冯·洪堡基金会颁发的Friedrich Wilhelm Bessel Award，2022年他被选为欧洲科学院院士。Mikhail Ivanov教授在极端非线性光学、阿秒与强场物理、量子控制、二维和强关联材料中的超快动力学以及化学物理等领域中取得了众多引领性研究成果，极大推动了现代物理学的发展。他在国际知名学术期刊上发表论文230余篇（其中Science、Nature、Physical Review Letters、Rev. Mod. Phys、Nature与Science子刊 近100篇），总被引用超过37,500次，H指数（Hirsch index）为80。

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6163银河线路检测中心学术论坛创办于2020年9月，邀请国内外高校和研究机构高层次科技创新领军学者就物理学及相关领域的基础前沿探索、关键技术突破和热点问题等做学术演讲，旨在推进高质量学术交流，促进学科交叉融合和开拓新兴特色方向研究，培养具有科学精神、全球视野、创新能力、批判性思维的优秀青年人才。

主办：

6163银河线路检测中心

联系人：

彭良友  liangyou.peng@pku.edu.cn