61 citations · 92 across the 3 of their papers we have counts for
3 papers
Non-perturbative vacuum-polarization effects in proton-laser collisions
A. Di Piazza, K. Z. Hatsagortsyan, C. H. Keitel
In the collision of a high-energy proton beam and a strong laser field, merging of the laser photons can occur due to the polarization of vacuum. The probability of photon merging…
Zeptosecond -ray pulses
Michael Klaiber, Karen Z. Hatsagortsyan, Christoph H. Keitel
High-order harmonic generation (HHG) in the relativistic regime is employed to obtain zeptosecond pulses of -rays. The harmonics are generated from atomic systems in counterprop…
Particle physics with a laser-driven positronium atom
Carsten Müller, Karen Z. Hatsagortsyan, Christoph H. Keitel
A detailed quantum-electrodynamic calculation of muon pair creation in laser-driven electron-positron collisions is presented. The colliding particles stem from a positronium atom…