Electron spin fluctuation in intense laser fields

2017 ◽  
Vol 19 (46) ◽  
pp. 31138-31155
Author(s):  
Youssef Korani ◽  
Hassan Sabzyan
Keyword(s):  
Dirac Equation ◽  
Electron Spin ◽  
Spin Fluctuation ◽  
Laser Pulses ◽  
Time Dependent ◽  
Intense Laser ◽  
Intense Laser Fields ◽  
Laser Fields ◽  
Intense Laser Pulses ◽  
Fluctuation Dynamics

Spin fluctuation dynamics of diatomic and monoatomic ions interacting with ultrashort intense laser pulses is studied by solving the time-dependent Dirac equation.

scholarly journals Femtosecond Laser-Assisted Electron Scattering for Ultrafast Dynamics of Atoms and Molecules

Atoms ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 85 ◽  
Author(s):  
Reika Kanya ◽  
Kaoru Yamanouchi
Keyword(s):  
Electron Diffraction ◽  
Electron Scattering ◽  
Experimental Studies ◽  
Laser Pulses ◽  
Intense Laser ◽  
Intense Laser Fields ◽  
Laser Fields ◽  
Optical Gating ◽  
Intense Laser Pulses ◽  
New Concepts

The recent progress in experimental studies of laser-assisted electron scattering (LAES) induced by ultrashort intense laser fields is reviewed. After a brief survey of the theoretical backgrounds of the LAES process and earlier LAES experiments started in the 1970s, new concepts of optical gating and optical streaking for the LAES processes, which can be realized by LAES experiments using ultrashort intense laser pulses, are discussed. A new experimental setup designed for measurements of LAES induced by ultrashort intense laser fields is described. The experimental results of the energy spectra, angular distributions, and laser polarization dependence of the LAES signals are presented with the results of the numerical simulations. A light-dressing effect that appeared in the recorded LAES signals is also shown with the results of the numerical calculations. In addition, as applications of the LAES process, laser-assisted electron diffraction and THz-wave-assisted electron diffraction, both of which have been developed for the determination of instantaneous geometrical structure of molecules, are introduced.

Nonlinear time-dependent density functional theory investigation and visualization of ionizations in CO2 — Effects of laser intensities and molecular orientations

2010 ◽  
Vol 88 (11) ◽  
pp. 1186-1194
Author(s):  
Emmanuel Penka Fowe ◽  
André Dieter Bandrauk
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Laser Pulses ◽  
Time Dependent ◽  
Intense Laser ◽  
Functional Theory ◽  
Intense Laser Pulses ◽  
Highest Occupied Molecular Orbital ◽  
Analysis Of The Images ◽  
Dependent Density

Time-dependent density functional theory (TDDFT) studies of the ionization of CO2 by intense laser pulses Io ≥ 1 × 1014 W/cm2, at 800 nm are presented using the LB94 and the LDA potentials. Results reveal that for lower laser peak intensity, Io = 3.5 × 1014 W/cm2, the highest occupied molecular orbital (HOMO) contributes significantly to ionization owing to its lower ionization potential (IP), whereas the inner orbitals play the important role for higher laser peak intensities. Even though such lower orbitals have higher IP, the ionization process occurs when orbital densities are maximum along the direction of the laser field polarization. These findings are confirmed through the analysis of the images from the time-dependent electron localization function (TDELF) and the spectra of higher order harmonic generation (HOHG). Additionally, in spite of the IP difference between Kohn–Sham orbitals from LDA and LB94 potentials, our results show almost the same trend for both.

scholarly journals Numerical stability of time-dependent coupled-cluster methods for many-electron dynamics in intense laser pulses

2020 ◽  
Vol 152 (7) ◽  
pp. 071102 ◽  
Author(s):  
Håkon Emil Kristiansen ◽  
Øyvind Sigmundson Schøyen ◽  
Simen Kvaal ◽  
Thomas Bondo Pedersen
Keyword(s):  
Numerical Stability ◽  
Laser Pulses ◽  
Time Dependent ◽  
Intense Laser ◽  
Coupled Cluster ◽  
Electron Dynamics ◽  
Coupled Cluster Methods ◽  
Intense Laser Pulses ◽  
Cluster Methods
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