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The Journal of chemical physics, 2011-02, Vol.134 (5), p.054113-054113-8
Ort / Verlag
United States: American Institute of Physics
Erscheinungsjahr
2011
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
We report explicitly time-dependent coupled cluster singles doubles (TD-CCSD) calculations, which simulate the laser-driven correlated many-electron dynamics in molecular systems. Small molecules, i.e., HF, H
2
O, NH
3
, and CH
4
, are treated mostly with polarized valence double zeta basis sets. We determine the coupled cluster ground states by imaginary time propagation for these molecules. Excited state energies are obtained from the Fourier transform of the time-dependent dipole moment after an ultrashort, broadband laser excitation. The time-dependent expectation values are calculated from the complex cluster amplitudes using the corresponding configuration interaction singles doubles wave functions. Also resonant laser excitations of these excited states are simulated, in order to explore the limits for the numerical stability of our current TD-CCSD implementation, which uses time-independent molecular orbitals to form excited configurations.
Sprache
Englisch
Identifikatoren
ISSN: 0021-9606
eISSN: 1089-7690
DOI: 10.1063/1.3530807
Titel-ID: cdi_proquest_miscellaneous_851226686
Format
–
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