Journal
CHEMICAL PHYSICS
Volume 329, Issue 1-3, Pages 168-178Publisher
ELSEVIER
DOI: 10.1016/j.chemphys.2006.05.028
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The multi-configurational time-dependent Hartree approach facilitates multi-dimensional wave packet calculations studying polyatomic reaction processes. The efficiency of the approach results from the use of an optimally adapted time-dependent basis of single-particle functions employed in the wavefunction representation. As a consequence, the equations of motion are non-linear. An efficient integration scheme for these equations has been developed by Beck and Meyer [Z. Phys. D 42 (1997) 113]. The scheme is optimally suited for studies of systems where the Hamiltonian can be represented as a sum of products of single-particle operators. Employing the same basic ideas, the present work now introduces and discusses revised integration schemes which are more efficient for systems, where the Hamiltonian includes a general potential energy function. The H + CH4 H-2 + CH3 reaction is employed as an example to test the efficiency of the different schemes. (c) 2006 Elsevier B.V. All rights reserved.
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