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Keywords:

  • reduced density operator;
  • photoinduced dynamics;
  • laser pulse control;
  • Frenkel-exciton transfer

Abstract

An introduction to the dissipative quantum dynamics description of molecular system is presented based on the definition of a reduced density operator equation image(t) for the system under consideration. Methods are reviewed that have been used to calculate equation image(t) with emphasis on an approximate equation of motion known as the quantum master equation. The inclusion of external ultrafast fields is particularly accounted for, and a brief description of femtosecond laser pulse control experiments is given. Different applications are mentioned, concentrating on the description of Frenkel-exciton dynamics in biological chromophore complexes (photosynthetic antennae). Finally, recent achievements guiding exciton transfer by tailored femtosecond laser pulses are considered. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006