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Nonmonotonic field dependence of damping and reappearance of Rabi oscillations in quantum dots.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • A. Vagov
  • M. D. Croitoru
  • V. M. Axt
  • T. Kuhn
  • F. M. Peeters
<mark>Journal publication date</mark>1/06/2007
<mark>Journal</mark>Physical review letters
Issue number22
Pages (from-to)227403
Publication StatusPublished
<mark>Original language</mark>English


The dynamics of strongly confined laser driven semiconductor quantum dots coupled to phonons is studied theoretically by calculating the time evolution of the reduced density matrix using a numerical path integral method. We explore the cases of long pulses, strong dot-phonon and dot-laser coupling, and high temperatures, which, up to now, have been inaccessible. We find that the phonon-induced damping of Rabi rotations is a nonmonotonic function of the laser field that is increasing at low fields and decreasing at high fields. This results in a reappearance of Rabi rotations at high fields. This phenomenon is of a general nature which occurs for all temperatures and carrier-phonon coupling strengths.