Recursive residue generation method RRGM

Such a method was first proposed by Wyatt and co-workers.43 7,56 In their so-called recursive residue generation method (RRGM), both eigenvalues and overlaps are obtained using the Lanczos algorithm, without explicit calculation and storage of eigenvectors. In particular, the residue in Eq. [41] can be expressed as a linear combination of two residues ... 

RRGM summary. In this section, we have reviewed the recursive residue generation method for the computation of the lineshape function and the transition probabilities. The RRGM aims at computation of the set of residues and eigenvalues ra, Ea. The steps are summarized as follows ... 

EOMCC = equation-of-motion coupled-clu.ster FOD = fourth-order differencing MBGF = many-body Green s function RR = resonance Raman RRGM = recursive-residue-generation method SIL = short-time iterative Lanczos SOD = second-order differencing. 

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