QUANTUM BATTLES 2023
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Day 2: Quantum Interference & Imaging

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​Coherent Control and Attosecond Dynamics with Pulsed XUV and IR Radiation
 
Klaus Bartschat
 
Department of Physics & Astronomy, Drake University, Des Moines, Iowa, USA

​[email protected]
 
​
Recent advances in the generation of various light sources have enabled the exploration of ultrafast dynamics in atoms and molecules.  For example, the photoelectron angular distribution can be controlled by varying the time delay between several interfering pulses, such as the fundamental and the second harmonic of XUV pulses generated by a free-electron laser.  Other setups may involve the combination of an XUV and an IR pulse, with very different pulse parameters depending on whether the XUV or an XUV pulse train can already ionize the system and the IR is used to extract phase information via a RABBIT scheme, or whether the XUV can populate a high Rydberg level from where a relatively strong IR pulse may ionize the system.  Going from linear to circular and generally elliptical polarization opens up further areas of study, such as circular dichroism and so-called "attoclock experiments”.  This presentation will provide an overview of our work with a number of experimental groups worldwide.  
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