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Klaus Bartschat

As seen in: MDPI, Physical Review B
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Articles

Benchmark Calculations for Near-Threshold Electron-Impact Excitation of the (1s3s)3,1S States of Helium

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By Klaus Bartschat, Igor Bray, Dmitry V. Fursa
| MDPI
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
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Strong-Field Ionization Phenomena Revealed by Quantum Trajectories

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By Taylor Moon, Klaus Bartschat, Nicolas Douguet
| Physical Review B
We investigate the photoionization dynamics of atoms subjected to intense, ultrashort laser pulses through the use of quantum trajectories. This method provides a unique and consistent framework for examining electron dynamics within a time-dependent potential barrier.
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Efficient Time-Dependent Method for Strong-Field Ionization of Atoms with Smoothly Varying Radial Steps

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By Nicolas Douguet, Mikhail Guchkov, Klaus Bartschat, Samantha Fonseca dos
| MDPI
1. Introduction The development of intense and tunable optical light sources has revolutionized atomic physics by revealing new strong-field phenomena, e.g., high-order harmonic generation (HHG) [1], above-threshold ionization (ATI) [2], Rydberg- state stabilization [3,4], or the transfer of the light’s orbital angular momentum (OAM) via optical vortex beams [5,6].
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