| 2009 | Carsten Müller, Carlus Deneke, Matthias Ruf, Guido R. Mocken, Karen Z. Hatsagortsyan, and Christoph H. Keitel Lepton pair production in high-frequency laser fields
. In: Laser Physics, 2009, 791-796 |
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| 2009 | Matthias Ruf, Guido R. Mocken, Carsten Müller, Karen Z. Hatsagortsyan, and Christoph H. Keitel: Pair production in laser fields oscillating in space and time
. In: Phys. Rev. Lett. , 2009, 080402-1-080402-4 |
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| 2009 | Antonino Di Piazza, Karen Z. Hatsagortsyan, and Christoph H. Keitel: Strong signatures of radiation reaction below the radiation-dominated regime
. In: Physical Review Letters, 2009, 254802-1-254802-4 |
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| 2008 | Karen Z. Hatsagortsyan, Michael Klaiber, Carsten Müller, Markus C. Kohler, and Christoph H. Keitel: Laser-driven relativistic recollisions
. In: Journal of Optical Society of America B , 2008, 92-103 |
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| 2008 | Justin Peatross, Cartsen Müller, Karen Z. Hatsagortsyan, and Christoph H. Keitel Photoemission of a Single-Electron Wave Packet in a Strong Laser Field
. In: Phys. Rev. Lett. , 2008, 153601-1-153601-4 |
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| 2008 | Michael Klaiber, Karen Z. Hatsagortsyan, Carsten M\'uller and Christoph H. Keitel Coherent hard x-rays from attosecond pulse train-assisted harmonic generation . In: Optics Letters , 2008, 411-413 |
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| 2008 | Carsten Müller, Antonino Di Piazza, Atif Shahbaz, Thomas J. Bürvenich, Joerg Evers, Karen Z. Hatsagortsyan, and Christoph H. Keitel High-Energy, Nuclear, and QED Processes in Strong Laser Fields. In: Laser Physics, 2008, 175-184 |
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| 2008 | Antonino Di Piazza, Karen Z. Hatsagortsyan, and Christoph H. Keitel Laser-photon merging in proton-laser collisions
. In: Phys. Rev. A, 2008, 062109-1-062109-13 |
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| 2008 | Carsten Müller, Karen Z. Hatsagortsyan and Christoph H. Keitel
Muon pair creation from positronium in a linearly polarized laser field
. In: Physical Review A , 2008, 033408-1-033408-19 |
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| 2008 | Antonino Di Piazza, Karen Z. Hatsagortsyan and Christoph H. Keitel: Nonperturbative Vacuum-Polarization Effects in Proton-Laser Collisions. In: Physical Review Letters, 2008, 010403-1-010403-4 |
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| 2008 | Carsten Müller, Karen Z. Hatsagortsyan and Christoph H. Keitel: Particle physics with a laser-driven positronium atom. In: Physics Letters B , 2008, 209-213 |
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| 2008 | Antonino Di Piazza and Karen Z. Hatsagortsyan: Quantum interaction among intense laser beams in vacuum
. In: The European Physical Journal ST, 2008, 147-155 |
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| 2008 | Antonino Di Piazza and Karen Z. Hatsagortsyan Quantum vacuum effects in strong laser beams
. In: Plasma Phys. Control. Fusion, 2008, 124035-1 -124035 -7 |
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| 2007 | A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel Enhancement of vacuum polarization effects in a plasma
. In: Physics of Plasmas , 2007, 032102-1-032102-13 |
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| 2007 | Michael Klaiber, Karen Z. Hatsagortsyan, and Christoph H. Keitel Fully relativistic laser-induced ionization and recollision processes
. In: Physical Review A, 2007, 063413-1-063413-19 |
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| 2007 | Carsten Müller, Guido R. Mocken, Karen Z. Hatsagortsyan, and Christoph H. Keitel: High-energy Quantum Dynamics in Ultra-Intense Laser Pulses
. In: American Institute of Physics, Conference Proceedings , 2007, 552-558 |
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| 2007 | A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel: Nonlinear interaction of strong laser fields in a vacuum
. In: Laser Physics , 2007, 345-349 |
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| 2007 | Antonino Di Piazza, Karen Z. Hatsagortsyan, Joerg Evers, and Christoph H. Keitel: Vacuum fluctuations and nuclear quantum optics in strong laser pulses
. In: Proc. SPIE Int. Soc. Opt. Eng., 2007, 660305-1-660305-11 |
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| 2006 | Michael Klaiber, Karen Z. Hatsagortsyan, Christoph H. Keitel: Gauge-invariant relativistic strong-field approximation. In: Physical Review A, 2006, 053411-1-053411-7 |
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| 2006 | Antonino Di Piazza, Karen Z. Hatsagortsyan, and Christoph H. Keitel: Light Diffraction by a Strong Standing electromagnetic Wave
. In: Physical Review Letters, 2006, 083603-1-083603-4 |
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| 2006 | Karen Z. Hatsagortsyan, Carsten Müller, and Christoph H. Keitel: Microscopic laser-driven high-energy colliders
. In: Europhysics Letters, 2006, 29-35 |
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| 2006 | Carsten Müller, Karen Z. Hatsagortsyan, and Christoph H. Keitel: Muon pair creation from positronium in a circularly polarized laser field
. In: Physical Review D, 2006, 074017-1-074017-16 |
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| 2006 | Karen Z. Hatsagortsyan, Carsten Müller, and Christoph H. Keitel: Nonperturbative multiphoton processes and electron-positron pair production. . In: American Institut of Physics, Conference Proceedings , 2006, 442-447 |
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| 2006 | Alexander Milstein, Cartsen Müller, Karen Hatsagortsyan, Ullrich Jentschura, and Christoph Keitel: Polarization-operator approach to electron-positron pair production in combined laser and Coulomb fields
. In: Physical Review A , 2006, 062106-1-062106-10 |
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| 2006 | Yousef I. Salamin, S. X. Hu, Karen Z. Hatsagortsyan and Christoph H. Keitel
Relativistic high-power laser-matter interactions (review). In: Physics Reports, 2006, 41-155 |
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| 2006 | Michael Klaiber, Karen Z. Hatsagortsyan, and Christoph H. Keitel: Relativistic ionization rescattering with tailored laser pulses. In: Physical Review A, rapid communications , 2006, 051803(R)-1-051803(R)-4 |
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| 2005 | Michael Klaiber
Karen Hatsagortsyan
Christoph Keitel: Above-threshold ionization beyond the dipole approximation. In: Physical Review A, 2005, 033408-1-033408-7 |
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| 2005 | A. Di Piazza,
K. Z. Hatsagortsyan,
C. H. Keitel: Harmonic generation from laser-driven vacuum. In: Physical Review D, 2005, 085005-1-085005-23 |
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| 2005 | Karen Hatsagortsyan, Christoph Keitel: Thin crystal layers in superstrong laser fields: Dynamics and coherent x-ray generation. In: Physical Review A, 2005, 023812-1-023812-15 |
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| 2004 | Björn Henrich, Karen Z. Hatsagortsyan, Christiph H. Keitel Positronium in Intense Laser Fields. In: Physical Review Letters, 2004, 013601-1-013601-4 |
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| 2002 | A.K. Avetissian, K.Z. Hatsagortsian, G.F. Mkrtchian, Kh.V. Sedrakian Nonlinear Compton scattering of strong laser radiation on channeled particles in a crystal. In: Physics Letters A, 2002, 331-336 |
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| 2002 | Karen Hatsagortsyan and Christoph Keitel: Phase matched high harmonic generation from laser-driven crystals. . In: Journal of Physics B, 2002, L175-L177 |
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| 2002 | Guido R. Mocken, Yousef I. Salamin, Karen Z. Hatsagortsyan and Christoph H. Keitel: Relativistic laser-particle interaction: From single electrons to multi-particle systems.. In: American Institute of Pphysic, Conference Proceedings , 2002, 44-55 |
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| 2002 | Karen Hatsagortsyan, Ulrich Jentschura and Christoph Keitel: Single and Crystalized Ions in Ultra-Intense Laser Pulses. In: AIP Conf. Proc.
, 2002, 71-78 |
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| 2002 | M. W. Walser, D. J. Urbach, K. Hatsagortsyan, S. X. Hu and C.H. Keitel Spin and radiation in intense laser fields. In: Physical Review A, 2002, 043410-1-043410-14 |
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| 2001 | Karen Hatsagortsyan and Christoph Keitel: X-ray amplification by laser controlled coherent bremsstrahlung.. In: Physical Review Letters, 2001, 2277-2280 |
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