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, H2O, NH3, and CH4, 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.
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7 February 2011
Research Article|
February 02 2011
Explicitly time-dependent coupled cluster singles doubles calculations of laser-driven many-electron dynamics
Christian Huber;
Christian Huber
Universität Potsdam
, Institut für Chemie, Theoretische Chemie, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam, Germany
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Tillmann Klamroth
Tillmann Klamroth
a)
Universität Potsdam
, Institut für Chemie, Theoretische Chemie, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam, Germany
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a)
Electronic mail: klamroth@uni-postdam.de.
J. Chem. Phys. 134, 054113 (2011)
Article history
Received:
September 07 2010
Accepted:
December 04 2010
Citation
Christian Huber, Tillmann Klamroth; Explicitly time-dependent coupled cluster singles doubles calculations of laser-driven many-electron dynamics. J. Chem. Phys. 7 February 2011; 134 (5): 054113. https://doi.org/10.1063/1.3530807
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