1.7k citations · 13.7k across the 342 of their papers we have counts for
7 papers · 1 filter
Ionization suppression of excited atomic states beyond the stabilization regime
Andreas Staudt, Christoph H. Keitel, John S. Briggs
A two-dimensional model atom is employed to study the ionization behavior of initially excited atomic states in highly-frequent intense laser pulses beyond the dipole approximation…
Comparison of classical and second quantized description of the dynamic Stark shift
M. Haas, U. D. Jentschura, C. H. Keitel
We compare the derivation of the dynamic Stark shift of hydrogenic energy levels in a classical framework with an adiabatically damped laser-atom interaction, which is equivalent t…
Laser-dressed vacuum polarization in a Coulomb field
A. I. Milstein, I. S. Terekhov, U. D. Jentschura +1
We investigate quantum electrodynamic effects under the influence of an external, time-dependent electromagnetic field, which mediates dynamic modifications of the radiative correc…
Quantum correlations of an atomic ensemble via a classical bath
M. Macovei, J. Evers, C. H. Keitel
Somewhat surprisingly, quantum features can be extracted from a classical bath. For this, we discuss a sample of three-level atoms in ladder configuration interacting only via the…
Rapid refractive index enhancements via laser-mediated collectivity
Mihai Macovei, Christoph H Keitel
The collective interaction via the environmental vacuum is investigated for a mixture of two deviating multi-atom ensembles in a moderately intense laser field. Due to the numerous…
Analytical Approach to Wave Packet Dynamics of Laser-Driven Particles beyond the Dipole Approximation
M. Verschl, C. H. Keitel
An analytical approach to quantum mechanical wave packet dynamics of laser-driven particles is presented. The time-dependent Schroedinger equation is solved for an electron exposed…