Erlangen 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

A: Fachverband Atomphysik

A 25: Poster Session I

A 25.12: Poster

Tuesday, March 6, 2018, 16:15–18:15, Redoutensaal

A non-linear mapping from photo-electron spectra to pulse shape — •Sajal Kumar Giri, Ulf Saalmann, and Jan-Michael Rost — Max-Planck-Institute for the Physics of Complex Systems, Dresden, Germany

Strong field quantum dynamics are very sensitive to the shape of the interacting field. Finding a suitable pulse shape to reach a predefined target lies in the heart of quantum control. The forward non-linear mapping between the interacting pulse and the objective (photo-electron spectra(PES)) can be achieved by solving the time-dependent Schrödinger equation. However, the non-linear inverse mapping i.e. a mapping from the PES to the pulse shape is not straightforward. In this work, we have explored the non-linear inverse mapping using the artificial neural network. As a test system, we have studied quasi-resonant two-photon ionization of a helium atom for the interaction with different pulse shapes of the same energy and same frequency content. For this process, the photo-electron spectra are very different for different pulses and contain all the detailed information of the pulses. The sensitivity of each input to the output is also investigated in this work. This method can be extended for the measurement of free electron laser pulse shape from the knowledge of PES.