Calculations of photodissociation in intense laser fields: Validity of the adiabatic elimination of the continuum
M. E. Sukharev
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, USA
Search for more papers by this authorCorresponding Author
E. Charron
Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-XI, Bâtiment 210, 91405 Orsay, Cedex, France
Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-XI, Bâtiment 210, 91405 Orsay, Cedex, FranceSearch for more papers by this authorA. Suzor-Weiner
Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-XI, Bâtiment 210, 91405 Orsay, Cedex, France
Search for more papers by this authorM. V. Fedorov
General Physics Institute, Russian Academy of Sciences, 38 Vavilov Street, Moscow 117942, Russia
Search for more papers by this authorM. E. Sukharev
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, USA
Search for more papers by this authorCorresponding Author
E. Charron
Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-XI, Bâtiment 210, 91405 Orsay, Cedex, France
Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-XI, Bâtiment 210, 91405 Orsay, Cedex, FranceSearch for more papers by this authorA. Suzor-Weiner
Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-XI, Bâtiment 210, 91405 Orsay, Cedex, France
Search for more papers by this authorM. V. Fedorov
General Physics Institute, Russian Academy of Sciences, 38 Vavilov Street, Moscow 117942, Russia
Search for more papers by this authorAbstract
We investigate the range of applicability of the approximations of adiabatic and semiadiabatic elimination of the continuum in the numerical simulation of strong field photodissociation processes. By comparing exact and approximate calculations of the fragmentation of the H
molecular ion when excited by a short and intense laser pulse, we show that these approximations do not hold when a few excited vibrational states are transiently populated. This failure mainly arises from the fast variation of the phases of the excited-state time-dependent amplitudes. © 2004 Wiley Periodicals, Inc. Int J Quantum Chem, 2004
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