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A: Atomphysik

A 17: Atome in äusseren Feldern

A 17.2: Vortrag

Donnerstag, 7. März 2002, 16:45–17:00, HS 01/EZ04

2D helium in electromagnetic fields — •Javier Madroñero and Andreas Buchleitner — Max-Planck Institut für Physik komplexer Systeme

We present an ab initio quantum treatment of the two-dimensional helium atom exposed to electromagnetic fields. Our approach combines Floquet theory with the complex dilation of the Hamiltonian, and explores the dynamical symmetries of the planar three body Coulomb problem. The Hamiltonian is represented in a suitable basis set which induces strong selection rules [1]. For near resonant driving of doubly excited Rydberg states, this leads to a complex-symmetric, generalized eigenvalue problem of rather high dimension, which has to be solved using advanced techniques of parallel programming.
L. Hilico, B. Grémaud, D. Delande, Preprint 2001.