7月29日 Jan M. Rost:Timing ultrafast processes, non-adiabaticity and time itself

来源:中国足球竞彩比分 时间:2020-07-21浏览:12设置


讲座题目:Timing ultrafast processes, non-adiabaticity and time itself

主讲人:Prof. Jan M. Rost

主持人:倪宏程  研究员

开始来源:中国足球竞彩比分 时间:2020-07-29 16:00:00

讲座地址:腾讯会议  ID239 822 154

主办单位:精密光谱科学与技术国家重点实验室

 

报告人简介:

       Jan M. Rost教授,1990年博士毕业于德国弗莱堡大学,自1999年起任德国马克斯普朗克复杂系统物理研究所所长,自2000年起兼任德累斯顿工业大学理论物理教授。主要研究兴趣在于强场超快物理、超冷原子物理理论。

 

报告内容:

Measuring implies interaction with the object to be measured. To render the observation   meaningful, the interaction should have negligible influence on it. Under this aspect, we will discuss two prominent ultrafast timing techniques, the attoclock timing strong field ionization, and the streaking technique for measuring (single) photoionization time delays. Keeping here the interaction effects negligible requires the period of the attoclock or streaking laser to be long compared to the relevant time scale of the active electron. Otherwise non-adiabatic effects kick in. For streaking shifts we will show how to quantify these effects with the underlying energy absorption of the electron from the streaking laser. In the end we will briefly explore the consequences for time if the interaction of light and matter is minimized.

 


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