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Dominant-interaction Hamiltonians for high-order-harmonic generation in laser-assisted collisions

Carlos Zagoya, Christoph-Marian Goletz, Frank Grossmann, and Jan-Michael Rost
Phys. Rev. A 85, 041401(R) – Published 12 April 2012

Abstract

We formulate the concept of dominant interaction Hamiltonians to obtain an integrable approximation to the dynamics of an electron exposed to a strong laser field and an atomic potential leading to high-order-harmonic generation. The concept relies on local information in phase space to switch between the interactions. This information is provided by classical integrable trajectories from which we construct a semiclassical wave function. The high-order-harmonic spectrum obtained is in excellent agreement with the accurate quantum spectrum. The separation in the atomic potential and laser coupling interactions should facilitate the calculation of high-order-harmonic spectra in complex systems.

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  • Received 18 January 2012

DOI:https://doi.org/10.1103/PhysRevA.85.041401

©2012 American Physical Society

Authors & Affiliations

Carlos Zagoya1, Christoph-Marian Goletz2, Frank Grossmann2, and Jan-Michael Rost1

  • 1Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, D-01187 Dresden, Germany
  • 2Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany

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Issue

Vol. 85, Iss. 4 — April 2012

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