Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW A 83, 021405(R) (2011). DOI: 10.1103/PhysRevA.83.021405 Copyright © 2011 American Physical Society. Used by permission.


Analytic formulas describing high-order harmonic generation (HHG) by atoms in a short laser pulse are obtained quantum mechanically in the tunneling limit. These results provide analytic expressions of the three-step HHG scenario, as well as of the returning electron wave packet, in a few-cycle pulse. Our results agree well with those of numerical solutions of the time-dependent Schrödinger equation for the H atom, while for Xe they predict many-electron atomic dynamics features in few-cycle HHG spectra and significant dependence of these features on the carrier-envelope phase of a laser pulse.

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