489 citations · 3.4k across the 100 of their papers we have counts for
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Non-sequential triple ionization in strong fields
Krzysztof Sacha, Bruno Eckhardt
We consider the final stage of triple ionization of atoms in a strong linearly polarized laser field. We propose that for intensities below the saturation value for triple ionizati…
Simple method for excitation of a Bose-Einstein condensate
Bogdan Damski, Zbyszek P. Karkuszewski, Krzysztof Sacha +1
An appropriate, time-dependent modification of the trapping potential may be sufficient to create effectively collective excitations in a cold atom Bose-Einstein condensate. The pr…
A method for collective excitation of Bose-Einstein condensate
Zbyszek P. Karkuszewski, Krzysztof Sacha, Jakub Zakrzewski
It is shown that by an appropriate modification of the trapping potential one may create collective excitation in cold atom Bose-Einstein condensate. The proposed method is complem…
Driven Rydberg atoms reveal quartic level repulsion
Krzysztof Sacha, Jakub Zakrzewski
The dynamics of Rydberg states of a hydrogen atom subject simultaneously to uniform static electric field and two microwave fields with commensurate frequencies is considered in th…