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New Limits to the Drift of Fundamental Constants from Laboratory Measurements
M. Fischer, N. Kolachevsky, M. Zimmermann +17
We have remeasured the absolute - transition frequency in atomic hydrogen. A comparison with the result of the previous measurement performed in 1999 sets a l…
Lamb Shift of Laser-Dressed Atomic States
U. D. Jentschura, J. Evers, M. Haas +1
We discuss radiative corrections to an atomic two-level system subject to an intense driving laser field. It is shown that the Lamb shift of the laser-dressed states, which are the…
Two-Loop QED Bound-State Calculations and Squared Decay Rates
Ulrich D. Jentschura, Christoph H. Keitel, Krzysztof Pachucki
We discuss the epsilon-method as used in various recent QED bound-state calculations by considering mathematical model examples. Recently obtained results for higher-order self-ene…
Spontaneous-emission suppression via multiphoton quantum interference
J. Evers, C. H. Keitel
The spontaneous emission is investigated for an effective atomic two-level system in an intense coherent field with frequency lower than the vacuum-induced decay width. As this add…
Quantum signatures in laser-driven relativistic multiple-scattering
Guido R. Mocken, Christoph H. Keitel
The dynamics of an electronic Dirac wave packet evolving under the influence of an ultra-intense laser pulse and an ensemble of highly charged ions is investigated numerically. Spe…