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  • 2005-2009
  • 2000-2004  (2)
  • 2001  (2)
  • PACS. 31.70.Hq Time-dependent phenomena: excitation and relaxation processes, and reaction rates – 33.80.Wz Other multiphoton processes  (2)
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  • 2005-2009
  • 2000-2004  (2)
Year
  • 2001  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Selective preparation of ground state wave-packets: a theoretical analysis of femtosecond pump-dump-probe experiments on the potassium dimer (2001)
    Springer
    The European physical journal 14 (2001), S. 167-172 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 31.70.Hq Time-dependent phenomena: excitation and relaxation processes, and reaction rates – 33.80.Wz Other multiphoton processes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We present simulations on pump-dump-probe experiments performed on the potassium dimer. The interaction of two time-delayed laser pulses prepares vibrational wave packets in the electronic ground state. The quantum calculations reveal to what extent it is possible to prepare a ground state superposition of states with high versus low vibrational quantum numbers by changing the pump-dump delay time. It is shown that transient signals may exhibit interference effects which are due to characteristics of ground state wave-packets composed of two components showing different vibrational dynamics. In this way the signals are able to yield information about vibrational overtone motion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170214
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Femtosecond pump-probe fluorescence signals from classical trajectories: comparison with wave-packet calculations (2001)
    Springer
    The European physical journal 15 (2001), S. 413-422 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 31.70.Hq Time-dependent phenomena: excitation and relaxation processes, and reaction rates – 33.80.Wz Other multiphoton processes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A classical approach to simulate femtosecond pump-probe experiments is presented and compared to the quantum mechanical treatment. We restrict the study to gas-phase systems using the I2 molecule as a numerical example. Thus, no relaxation processes are included. This allows for a direct comparison between purely quantum mechanical results and those obtained from classical trajectory calculations. The classical theory is derived from the phase-space representation of quantum mechanics. Various approximate quantum mechanical treatments are compared to their classical counterparts. Thereby it is demonstrated that the representation of the radial density as prepared in the pump-process is most crucial to obtain reliable signals within the classical approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170158
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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