JORGE MAHECHA

University of Antioquia, Colombia.

Long-stay Visiting Researcher

Research Topic

Electron dynamics of atoms adsorpted in metallic surfaces (i) Semi-classical propagation and spectral analysis in the negative Hydrogen ion interacting with a metallic surface: A semiclassical propagator method combined with harmonic inversion of short time signals is used to find the resonant states of an electron interacting with a H atom near a metallic surface. A semiclassical propagator approach is used to calculate an approximation to the autocorrelation function entirely in terms of classical trajectories. A filter-diagonalization method for harmonic inversion of the complex time signal is applied to extract the resonances. (ii) Stabilization and complex scaling approaches to find resonant states of an electron interacting with an atomic core and a metallic surface are applied with similar purposes of those of (i) and using different models for the electron-surface interaction. (iii) The electron-core-surface system in the regime of large atom-surface distances is studied by us

Last Check-in - Check-out date

12/08/2002 - 09/12/2002