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 H2+ 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.
- Adiabatic elimination
- Intense laser fields
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Physical and Theoretical Chemistry