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4 págs.; 3 figs.; PACS number(s): 33.80.2b, 42.50.HzA method was proposed to study the rotational dynamics of a molecule interacting with a single short laser pulse or a train of pulses. The possibility to use the arsenal of numerical methods developed for time independent systems was observed. It was stated that by diagonalizing a small configuration-interaction matrix formed from virtual Hartree-type wave functions, each Zeroth-order eigenstate can be improved. The number of time basis functions needed to obtain converged results may lead to a very large Floquet matrix. ©2004 American Physical SocietyFinancial support from the Ministerio de Ciencia y Tecnología\udof Spain, under Project No. BFM2001-2315 is acknowledged.Peer Reviewe

physical review a

Multiconfigurational pseudo-Hartree approach for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mi>t</mml:mi><mml:mo>,</mml:mo><mml:msup><mml:mi>t</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>propagator of a molecule in short laser fields

Multiconfigurational pseudo-Hartree approach for the(t,t′)propagator of a molecule in short laser fields