86 citations · 268 across the 9 of their papers we have counts for
9 papers
Reduced density matrix description of high-harmonic generation in multi-electron atoms: exploring sub-cycle correlation effects
Katharina Buczolich, Takeshi Sato, Kenichi L. Ishikawa +3
High-harmonic generation (HHG) is one of the fundamental processes at the heart of attosecond physics. Traditionally viewed as an effective single-particle effect, recent advances…
Non-equilibrium correlation dynamics in the one-dimensional Fermi-Hubbard model: A testbed for the two-particle reduced density matrix theory
Stefan Donsa, Fabian Lackner, Joachim Burgdörfer +4
We explore the non-equilibrium dynamics of a one-dimensional Fermi-Hubbard system as a sensitive testbed for the capabilities of the time-dependent two-particle reduced density mat…
The dynamically screened ladder approximation: Simultaneous treatment of strong electronic correlations and dynamical screening out of equilibrium
Jan-Philip Joost, Niclas Schlünzen, Hannes Ohldag +3
Dynamical screening is a key property of charged many-particle systems. Its theoretical description is based on the approximation that is extensively applied for ground-state…
Canonical density matrices from eigenstates of mixed systems
Mahdi Kourehpaz, Stefan Donsa, Fabian Lackner +2
One key issue of the foundation of statistical mechanics is the emergence of equilibrium ensembles in isolated and closed quantum systems. Recently, it was predicted that in the th…
Electron correlations in the antiproton energy loss distribution in He
S. Borbély, X. -M. Tong, S. Nagele +6
We present ab-initio calculations of the electronic differential energy transfer (DET) cross-sections for antiprotons with energies between keV and MeV interacting with heliu…
Accurate high-harmonic spectra from time-dependent two-particle reduced density matrix theory
Fabian Lackner, Iva Březinová, Takeshi Sato +2
The accurate description of the non-linear response of many-electron systems to strong-laser fields remains a major challenge. Methods that bypass the unfavorable exponential scali…
Time-dependent complete-active-space self-consistent-field method for atoms: Application to high-harmonic generation
Takeshi Sato, Kenichi L. Ishikawa, Iva Brezinova +3
We present the numerical implementation of the time-dependent complete-active-space self-consistent-field (TD-CASSCF) method [Phys. Rev. A, 88, 023402 (2013)] for atoms driven by a…
Propagating two-particle reduced density matrices without wavefunctions
Fabian Lackner, Iva Brezinova, Takeshi Sato +2
Describing time-dependent many-body systems where correlation effects play an important role remains a major theoretical challenge. In this paper we develop a time-dependent many-b…
Semiclassical wavefunctions for open quantum billiards
Fabian Lackner, Iva Brezinova, Florian Libisch +1
We present a semiclassical approximation to the scattering wavefunction for an open quantum billiard which is based on the reconstruction of the Feynman path inte…