報(bào) 告 人：楊瑋楓

報(bào)告題目：Tracing spatiotemporal information in ultrafast dynamics

報(bào)告時(shí)間：2024年5月7日（周二）上午9:30

報(bào)告地點(diǎn)：物理與電子工程學(xué)院428會(huì)議室

主辦單位：物理與電子工程學(xué)院、科學(xué)技術(shù)研究院

報(bào)告人簡(jiǎn)介：

楊瑋楓，海南大學(xué)教授、博士生導(dǎo)師，計(jì)算原子與分子物理專(zhuān)業(yè)委員會(huì)委員，原子分子物理專(zhuān)委會(huì)青年委員會(huì)委員，眼科影像與智能醫(yī)療專(zhuān)委會(huì)委員，海南省自然科學(xué)基金創(chuàng)新研究團(tuán)隊(duì)負(fù)責(zé)人，海南省物理學(xué)類(lèi)教學(xué)指導(dǎo)委員會(huì)主任委員，《光學(xué)學(xué)報(bào)（網(wǎng)絡(luò)版）》編委，卓越期刊Ultrafast Science青年編委。在新型光場(chǎng)調(diào)控、智能算法輔助成像和阿秒科學(xué)方面進(jìn)行了長(zhǎng)期深入的研究，在Physical Review Letters, Light: Science & Applications等上發(fā)表論文60余篇，多項(xiàng)研究成果入選英國(guó)物理學(xué)會(huì)、中國(guó)激光雜志社等的Highlight, Editor-in-Chief Choice Award等。先后二十余次應(yīng)邀在國(guó)內(nèi)外重要學(xué)術(shù)會(huì)議作特邀報(bào)告。入選上海市科技啟明星計(jì)劃，全國(guó)優(yōu)秀博士學(xué)位論文獎(jiǎng)，海南省高層次人才等。

報(bào)告摘要：

Tracing electron dynamics in real time is central to the understanding and exploring of the fundamental photophysical and photochemical processes. We demonstrated that the quantum time delays of different ionization pathways in strong-field dynamics can be clearly resolved and extracted with semiclassical statistical methods and a large number of elenctron trajectories. Our results unified the seemingly opposing quantum Eisenbud-Wigner-Smith time delay and classical Coulomb-induced time delay by highlighting the same physical picture. We employed deep learning to perform Feynman’s path integral approaches to demonstrate the classical-quantum correspondence. We found that some quantum mechanical concepts such as state, excitation and “resonance” in molecules can be expressed by statistical electron trajectories. We revealed the nonadiabatic tunneling dynamics in solid-state high harmonic generation.