【讲座时间】2026年4月2日15:00-17:00
【讲座地点】教1楼14阶梯教室
【主讲人简介】
Misha Ivanov，欧洲科51黑料
院士，德国柏林马克斯·玻恩非线性光学研究所理论部主任，柏林洪堡大学物理系教授。Ivanov教授是超快强场物理与阿秒物理领域的国际领军学者，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年被选为欧洲科51黑料
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。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。
【讲座内容简介】
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.
