14.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR1.6k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.4k papers
- Heidelberg UniversityDE1.3k papers
- Max Planck SocietyDE1.1k papers
- University of ZurichCH1.1k papers
- European Organization for Nuclear ResearchCH1k papers
- Laboratoire de Physique Nucléaire et de Hautes ÉnergiesFR990 papers
- Institute of Nuclear Physics, Polish Academy of SciencesPL973 papers
- University of Maryland, College ParkUS940 papers
- Rutherford Appleton LaboratoryGB939 papers
- Institute for Nuclear ResearchRU922 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT912 papers
21 papers · 2 filters
Attosecond Transient Absorption Spectroscopy of doubly-excited states in helium
Luca Argenti, Christian Ott, Thomas Pfeifer +1
Strong-field manipulation of autoionizing states is a crucial aspect of electronic quantum control. Recent measurements of the attosecond transient absorption spectrum of helium dr…
Sub-Poissonian statistics of Rydberg-interacting dark-state polaritons
Christoph S. Hofmann, Georg Günter, Hanna Schempp +5
Interfacing light and matter at the quantum level is at the heart of modern atomic and optical physics and enables new quantum technologies involving the manipulation of single pho…
Precision Atomic Physics Techniques for Nuclear Physics with Radioactive Beams
Klaus Blaum, Jens Dilling, Wilfried Nörtershäuser
Atomic physics techniques for the determination of ground-state properties of radioactive isotopes are very sensitive and provide accurate masses, binding energies, Q-values, charg…
Sub-barrier Coulomb effects on the interference pattern in tunneling ionization photoelectron spectra
Tian-Min Yan, D. Bauer
We use a quantum trajectory-based semi-classical method to account for Coulomb interaction between the photoelectron and the parent ion in the classically forbidden, sub-barrier re…
Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses
H. Fukuzawa, S. -K. Son, K. Motomura +27
We have investigated multiphoton multiple ionization dynamics of argon and xenon atoms using a new x-ray free electron laser (XFEL) facility, SPring-8 Angstrom Compact free electro…
Coherence-enhanced optical determination of the Th isomeric transition
Wen-Te Liao, Sumanta Das, Christoph H. Keitel +1
The impact of coherent light propagation on the excitation and fluorescence of thorium nuclei in a crystal lattice environment is investigated theoretically. We find that in the fo…
Collapse-and-revival dynamics of strongly laser-driven electrons
O. D. Skoromnik, I. D. Feranchuk, C. H. Keitel
The relativistic quantum dynamics of an electron in an intense single-mode quantized electromagnetic field is investigated with special emphasis on the spin degree of freedom. In a…
Interference-induced peak splitting in EUV superfluorescence
Ni Cui, Christoph H. Keitel, Mihai Macovei
We investigate the laser-induced quantum interference in EUV superfluorescence occurring in a dense gas of -type helium atoms coupled by a coherent laser field in the visible re…
On the dynamics of transfer-ionization in fast ion-atomic collisions
A. B. Voitkiv, X. Ma
We consider trasfer-ionization in collisions of fast (3.6 -- 11 MeV/u) protons, alpha-particles and lithium nuclei with helium atoms. There are just a few basic mechanisms contribu…
Finite-size effects in strongly interacting Rydberg gases
M. Gärttner, K. P. Heeg, T. Gasenzer +1
The scaling of the number of Rydberg excitations in a laser-driven cloud of atoms with the interaction strength is found to be affected by the finite size of the system. The scalin…
Coherent storage and phase modulation of single hard x-ray photons using nuclear excitons
Wen-Te Liao, Adriana Pálffy, Christoph H. Keitel
Coherent storage and phase modulation of x-ray single-photon wave packets in resonant scattering of light off nuclei is investigated theoretically. We show that by switching off an…
Resonance fluorescence in ultrafast and intense x-ray free-electron-laser pulses
S. M. Cavaletto, C. Buth, Z. Harman +4
The spectrum of resonance fluorescence is calculated for a two-level system excited by an intense, ultrashort x-ray pulse made available for instance by free-electron lasers such a…
Under-the-barrier dynamics in laser-induced relativistic tunneling
Michael Klaiber, Enderalp Yakaboylu, Heiko Bauke +2
The tunneling dynamics in relativistic strong-field ionization is investigated with the aim to develop an intuitive picture for the relativistic tunneling regime. We demonstrate th…
Quasiclassical approach to high-energy QED processes in strong laser and atomic fields
A. Di Piazza, A. I. Milstein
An approach, based on the use of the quasiclassical Green's function, is developed for investigating high-energy quantum electrodynamical processes in combined strong laser and ato…
Ion-lithium collision dynamics studied with an in-ring MOTReMi
D. Fischer, D. Globig, J. Goullon +12
We present a novel experimental tool allowing for kinematically complete studies of break-up processes of laser-cooled atoms. This apparatus, the 'MOTReMi', is a combination of a m…
Nuclear Charge Radius of Be
Andreas Krieger, Klaus Blaum, Mark L. Bissell +13
The nuclear charge radius of Be was precisely determined using the technique of collinear laser spectroscopy on the transition in the Be$…
Angular distribution of high-energy photoproduction close to the end of spectrum
A. Di Piazza, A. I. Milstein
We consider the differential cross section of electron-positron pair production by a high-energy photon in a strong Coulomb field close to the end of the electron or positron spect…
Resonantly enhanced photoionization in correlated three-atomic systems
B. Najjari, C. Müller, A. B. Voitkiv
Modifications of photoionization arising from resonant electron-electron correlations between neighbouring atoms in an atomic sample are studied. The sample contains atomic species…
Attosecond pulses at kiloelectronvolt photon energies from high-order harmonic generation with core electrons
Christian Buth, Feng He, Joachim Ullrich +2
High-order harmonic generation (HHG) in simultaneous intense near-infrared (NIR) laser light and brilliant x rays above an inner-shell absorption edge is examined. A tightly bound…
Dynamic formation of Rydberg aggregates at off-resonant excitation
M. Gärttner, K. P. Heeg, T. Gasenzer +1
The dynamics of a cloud of ultra-cold two-level atoms is studied at off-resonant laser driving to a Rydberg state. We find that resonant excitation channels lead to strongly peaked…
QED calculation of the nuclear magnetic shielding for hydrogen-like ions
V. A. Yerokhin, K. Pachucki, Z. Harman +1
We report an ab initio calculation of the shielding of the nuclear magnetic moment by the bound electron in hydrogen-like ions. This investigation takes into account several effect…