Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 140, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4860970
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A unified view on linear response of interacting systems utilizing multiconfigurational time-dependent Hartree methods is presented. The cases of one-particle and two-particle response operators for identical particles and up to all-system response operators for distinguishable degrees-of- freedom are considered. The working equations for systems of identical bosons and identical fermions, as well for systems of distinguishable particles are explicitly derived. These linear-response theories - applicable for discrete excitation spectra - provide numerically exact excitation energies and system's properties, when numerical convergence is achieved in the calculations. (C) 2014 AIP Publishing LLC.
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