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1. 10. 2002.
Quantum Orbits: A Space–Time Picture of Intense-Laser-Induced Processes in Atoms
The S matrix for processes induced by intense lasers in atoms can be expanded in terms of the contributions of quantum orbits which are the trajectories of electrons that enter the continuum through ionization and subsequently propagate in the laser field, in order finally to recombine with the atom or to rescatter. The quantum orbits are complex as a consequence of their origin by tunneling. Their superposition in the S-matrix element results in various effects such as constructive and destructive interference and may simulate resonant behavior.