Calculations of photodissociation in intense laser fields: Validity of the adiabatic elimination of the continuum

M. E. Sukharev; E. Charron; A. Suzor-Weiner; M. V. Fedorov

doi:10.1002/qua.20033

Calculations of photodissociation in intense laser fields: Validity of the adiabatic elimination of the continuum

M. E. Sukharev, E. Charron, A. Suzor-Weiner, M. V. Fedorov

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	452-459
Number of pages	8
Journal	International Journal of Quantum Chemistry
Volume	99
Issue number	4
DOIs	https://doi.org/10.1002/qua.20033
State	Published - Jun 23 2004
Externally published	Yes

Keywords

Adiabatic elimination
Intense laser fields
Photodissociation

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Physical and Theoretical Chemistry

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10.1002/qua.20033

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abstract = "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.",

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T2 - Validity of the adiabatic elimination of the continuum

AU - Sukharev, M. E.

AU - Charron, E.

AU - Suzor-Weiner, A.

AU - Fedorov, M. V.

PY - 2004/6/23

Y1 - 2004/6/23

N2 - 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.

AB - 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.

KW - Adiabatic elimination

KW - Intense laser fields

KW - Photodissociation

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JF - International Journal of Quantum Chemistry

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ER -

Calculations of photodissociation in intense laser fields: Validity of the adiabatic elimination of the continuum

Abstract

Keywords

ASJC Scopus subject areas

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