39 citations · 93 across the 14 of their papers we have counts for
14 papers
Edge states and quantum optical high-harmonic generation from topological insulators
Christian Saugbjerg Lange, Lars Bojer Madsen
The strong-field process of high-harmonic generation (HHG) has, in recent years, been treated from a quantum optical perspective in the emerging research area of strong-field quant…
Limitations of an approximative phase-space description in strong-field quantum optics
Rasmus Vesterager Gothelf, Lars Bojer Madsen, Christian Saugbjerg Lange
In recent years, strong-field processes such as high-order harmonic generation (HHG) and above-threshold ionization driven by nonclassical states of light have become an increasing…
High-Order Harmonic Generation with Beyond-Semiclassical Emitter Dynamics: A Strong-Field Quantum Optical Heisenberg Picture Approach
Christian Saugbjerg Lange, Ella Elisabeth Lassen, Rasmus Vesterager Gothelf +1
Quantum-optical descriptions of strong-field processes have attracted significant attention in recent years. Typically, the theoretical modeling has been conducted in the Schröding…
Charge creation via quantum tunneling in one-dimensional Mott insulators: A numerical study of the extended Hubbard model
Thomas Hansen, Lars Bojer Madsen, Yuta Murakami
Charge creation via quantum tunneling, i.e. dielectric breakdown, is one of the most fundamental and significant phenomena arising from strong light(field)-matter coupling. In this…
Excitonic Enhancement of Squeezed Light in Quantum-Optical High-Harmonic Generation From a Mott Insulator
Christian Saugbjerg Lange, Thomas Hansen, Lars Bojer Madsen
The strong-field induced generation of nonclassical states of light is not only a subject of fundamental research but also has potential usage in quantum information science and te…
High-Harmonic Generation in a Crystal Driven by Quantum Light
Rasmus Vesterager Gothelf, Christian Saugbjerg Lange, Lars Bojer Madsen
We study intraband high-harmonic generation (HHG) in a crystal driven by quantum light. Previous theoretical studies have developed a framework based on coherent state expansions i…
Hierarchy of approximations for describing quantum light from high-harmonic generation: A Fermi-Hubbard model study
Christian Saugbjerg Lange, Lars Bojer Madsen
The quantum optical description of high-order harmonic generation where both the electrons of the generating medium and the driving and generated light fields are described quantum…
Beyond Electric-Dipole Treatment of Light-Matter Interactions in Materials: Nondipole Harmonic Generation in Bulk Si
Simon Vendelbo Bylling Jensen, Nicolas Tancogne-Dejean, Angel Rubio +1
A beyond electric-dipole light-matter theory is needed to describe emerging X-ray and THz applications for characterization and control of quantum materials but inaccessible as non…
Many-body effects on high-harmonic generation in Hubbard ladders
Yuta Murakami, Thomas Hansen, Shintaro Takayoshi +2
We show how many-body effects associated with background spin dynamics control the high-harmonic generation (HHG) in Mott insulators by analyzing the two-leg ladder Hubbard model.…
Intra- and intercycle analysis of intraband high-order harmonic generation
Asbjørn Tornøe Andersen, Simon Vendelbo Bylling Jensen, Lars Bojer Madsen
We study intraband high-order harmonic generation arising from a band-gap material driven by a linearly polarized laser field. We factorize the intraband high-order harmonic-genera…
Noninteger high-harmonic generation from extended correlated systems
Christian Saugbjerg Lange, Thomas Hansen, Lars Bojer Madsen
The spectra produced by high-harmonic generation (HHG) typically exhibit well-defined peaks at odd integers times the laser frequency. However, in recent investigations of HHG from…
Scattering of ultrashort electron wave packets: optical theorem, differential phase contrast and angular asymmetries
Yuya Morimoto, Lars Bojer Madsen
Recent advances in electron microscopy allowed the generation of high-energy electron wave packets of ultrashort duration. Here we present a non-perturbative S-matrix theory for sc…
Electron-correlation induced nonclassicallity of light from high-harmonic generation
Christian Saugbjerg Lange, Thomas Hansen, Lars Bojer Madsen
We study the effect of electron-electron correlations on the quantum state of the light emitted from high-harmonic generation (HHG). The quantum state of the emitted light is obtai…
Advanced momentum sampling and Maslov phases for a precise semiclassical model of strong-field ionization
Mads Brøndum Carlsen, Emil Hansen, Lars Bojer Madsen +1
Recollision processes are fundamental to strong-field physics and attoscience, thus models connecting recolliding trajectories to quantum amplitudes are a crucial part in furtherin…