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A: Fachverband Atomphysik

A 25: Attosecond physics

A 25.1: Poster

Wednesday, March 13, 2019, 16:15–18:15, S Fobau Physik

Tunneling time in attosecond experiments from time operator prespective — •Ossama Kullie — Institute of Physics, Department of Mathematics and Natural Science, Universitity of Kassel, Germany

Using a semi classical model we found a tunneling time relation [1,2], which successfully calculates the tunneling (tunnel-ionization) time in attosecond experiment for He- and H-atom, with a good agreement with the experiment. The tunneling time in our model is real and can be interpreted as a delay time with respect to the ionization at atomic field strength, which marks the above-threshold ionization regime, where the ionization is classically allowed process. The model exploits the time-energy uncertainty relation without using an explicit time observable or time operator. The existence of such time operator is mathematically proven, however no unambiguous and generally accepted time operator is found so far, especially to calculate the tunneling time in attosecond experiment. In this work we discuss this issue, where our aim is to find a time operator, with which we can calculate the tunneling time given in [1,2] for He- and H-atom. [1] O. Kullie. (open access) Mathematics 6, 00192 (2018). [2] O. Kullie, Annals of Physics 389 (2018) 333.